US6230037B1
Expired / Lapsed
US
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Biomagnetic field measuring method and apparatus
Assignee: Hitachi Ltd
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Filing: 1998-03-06
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Granted: 2001-05-08
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Expires: 2018-03-06
Abstract
Abstract A biomagnetic field measuring apparatus has a plurality of fluxmeters disposed externally of a living body and each including a superconducting quantum interference device (SQUID) for detecting a biomagnetic field generated from the living body, the plurality of fluxmeters being operative to detect a temporal change of a component of the biomagnetic field in a first direction which is normal to the surface of the living body, an operation processor for performing computation for determining a temporal change of a value proportional to a root of square sum of differential values of the first-direction magnetic field component in second and third directions which cross the first direction and computation for integrating the temporal change of the value over a predetermined interval to determine an integral value, and a display for displaying the determined integral value. Distribution of magnetic fields generated from the heart is determined with a small number of fluxmeters.
Inventors
- 👤 Keiji Tsukada
- 👤 Akihiko Kandori
- 👤 Kenichi Okajima
- 👤 Hitoshi Sasabuchi
- 👤 Hiroyuki Suzuki
- 👤 Shoji Kondo
- 👤 Yasuaki Komiyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:58
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/24; A61B5/242; G; G01; G01R; G01R33/00; G01R33/02; G01R33/035; G01R33/0354; G01R33/10
Claims Analysis
Total Claims: 87
Claim 1
Independent Claim
151 words
A biomagnetic field measuring method comprising: (1) measuring a temporal change of a first magnetic field component of a biomagnetic field generated from a living body by using a plurality of fluxmeters disposed externally of said living body, each fluxmeter including a superconducting quantum interference device (SQUID), said first magnetic field component being in a first direction which is perpendicular to the surface of said living body; (2) determining a magnetic wave form expressing a temporal change of a value proportional to a root of square sum of a differential value of said first magnetic field component in a second direction which crosses said first direction and a differential value of said first magnetic field component in a third direction which crosses said first direction and said second direction; (3) integrating said magnetic wave form within a predetermined time interval to determine an integral value; and (4) displaying said integral value.
Claim 2
Dependent Claim
151 words
A biomagnetic field measuring method comprising: (1) measuring a temporal change of a first magnetic field component of a biomagnetic field generated from a living body by using a plurality of fluxmeters disposed externally of said living body, each fluxmeter including a superconducting quantum interference device (SQUID), said first magnetic field component being in a first direction which is perpendicular to the surface of said living body; (2) determining a magnetic wave form expressing a temporal change of a value proportional to a root of square sum of a differential value of said first magnetic field component in a second direction which crosses said first direction and a differential value of said first magnetic field component in a third direction which crosses said first direction and said second direction; (3) integrating said magnetic wave form within a predetermined time interval to determine an integral value; and (4) displaying said integral value.
Claim 3
Dependent Claim
130 words
A biomagnetic field measuring method comprising: (1) measuring a temporal change of first and second magnetic field components of a biomagnetic field generated from a living body by using a plurality of fluxmeters disposed externally of said living body, each fluxmeter including a superconducting quantum interference device (SQUID), said first and second magnetic field components being in first and second directions which are parallel to the surface of said living body and which cross each other; (2) determining a magnetic wave form expressing a temporal change of a value proportional to a root of square sum of said first magnetic field component and said second magnetic field component; (3) integrating said magnetic wave form within a predetermined time interval to determine an integral value; and (4) displaying said integral value.
Claim 4
Dependent Claim
130 words
A biomagnetic field measuring method comprising: (1) measuring a temporal change of first and second magnetic field components of a biomagnetic field generated from a living body by using a plurality of fluxmeters disposed externally of said living body, each fluxmeter including a superconducting quantum interference device (SQUID), said first and second magnetic field components being in first and second directions which are parallel to the surface of said living body and which cross each other; (2) determining a magnetic wave form expressing a temporal change of a value proportional to a root of square sum of said first magnetic field component and said second magnetic field component; (3) integrating said magnetic wave form within a predetermined time interval to determine an integral value; and (4) displaying said integral value.
Claim 5
Dependent Claim
170 words
A biomagnetic field measuring method comprising: (1) measuring a temporal change of a first magnetic field component of a biomagnetic field generated from a living body by using a plurality of fluxmeters disposed externally of said living body, each fluxmeter including a superconducting quantum interface device (SQUID), said first magnetic field component being in a first direction which is perpendicular to the surface of said living body; (2) determining a magnetic wave form expressing a temporal change of a value proportional to a root of square sum of a differential value of said first magnetic field component in a second direction which crosses said first direction and a differential value of said first magnetic field component in a third direction which crosses said first direction and said second direction; (3) integrating said magnetic wave form within a predetermined time interval to determine an integral value, and determining an isointegral map obtained by connecting points at which said integral values are equal to each other; and (4) displaying said isointegral map.
Claim 6
Dependent Claim
170 words
A biomagnetic field measuring method comprising: (1) measuring a temporal change of a first magnetic field component of a biomagnetic field generated from a living body by using a plurality of fluxmeters disposed externally of said living body, each fluxmeter including a superconducting quantum interface device (SQUID), said first magnetic field component being in a first direction which is perpendicular to the surface of said living body; (2) determining a magnetic wave form expressing a temporal change of a value proportional to a root of square sum of a differential value of said first magnetic field component in a second direction which crosses said first direction and a differential value of said first magnetic field component in a third direction which crosses said first direction and said second direction; (3) integrating said magnetic wave form within a predetermined time interval to determine an integral value, and determining an isointegral map obtained by connecting points at which said integral values are equal to each other; and (4) displaying said isointegral map.
Claim 7
Dependent Claim
194 words
A biomagnetic field measuring method comprising: (1) measuring a temporal change of a first magnetic field component of a biomagnetic field generated from a living body by using a plurality of fluxmeters disposed externally of said living body, each fluxmeter including a superconducting quantum interface device (SQUID), said first magnetic field component being in a first direction which is perpendicular to the surface of said living body; (2) determining a magnetic wave form expressing a temporal change of a value proportional to a root of square sum of a differential value of said first magnetic field component in a second direction which crosses said first direction and a differential value of said first magnetic field component in a third direction which crosses said first direction and said second direction; (3) integrating said magnetic wave form within a plurality of predetermined time intervals to determine a plurality of integral values, computing a combined value of any of a ratio, a sum or a difference between two of said integral values, and determining an isointegral map obtained by connecting points at which said combined values are equal to each other; and (4) displaying said isointegral map.
Claim 8
Dependent Claim
194 words
A biomagnetic field measuring method comprising: (1) measuring a temporal change of a first magnetic field component of a biomagnetic field generated from a living body by using a plurality of fluxmeters disposed externally of said living body, each fluxmeter including a superconducting quantum interface device (SQUID), said first magnetic field component being in a first direction which is perpendicular to the surface of said living body; (2) determining a magnetic wave form expressing a temporal change of a value proportional to a root of square sum of a differential value of said first magnetic field component in a second direction which crosses said first direction and a differential value of said first magnetic field component in a third direction which crosses said first direction and said second direction; (3) integrating said magnetic wave form within a plurality of predetermined time intervals to determine a plurality of integral values, computing a combined value of any of a ratio, a sum or a difference between two of said integral values, and determining an isointegral map obtained by connecting points at which said combined values are equal to each other; and (4) displaying said isointegral map.
Claim 9
Dependent Claim
146 words
A biomagnetic field measuring method comprising: (1) measuring a first magnetic field component of a biomagnetic field generated from a living body by using a plurality of fluxmeters disposed externally of said living body, each fluxmeter including a superconducting quantum interference device (SQUID), said first magnetic field component being in a first direction which is perpendicular to the surface of said living body; (2) determining a value proportional to a root of square sum of a differential value of said first magnetic field component in a second direction which crosses said first direction and a differential value of said first magnetic field component in a third direction which crosses said first direction and said second direction, and determining an isomagnetic field map obtained by connecting points at which said values proportional to said root are equal to each other; and (3) displaying said isomagnetic field map.
Claim 10
Dependent Claim
146 words
A biomagnetic field measuring method comprising: (1) measuring a first magnetic field component of a biomagnetic field generated from a living body by using a plurality of fluxmeters disposed externally of said living body, each fluxmeter including a superconducting quantum interference device (SQUID), said first magnetic field component being in a first direction which is perpendicular to the surface of said living body; (2) determining a value proportional to a root of square sum of a differential value of said first magnetic field component in a second direction which crosses said first direction and a differential value of said first magnetic field component in a third direction which crosses said first direction and said second direction, and determining an isomagnetic field map obtained by connecting points at which said values proportional to said root are equal to each other; and (3) displaying said isomagnetic field map.
Claim 11
Dependent Claim
160 words
A biomagnetic field measuring apparatus comprising: a plurality of fluxmeters disposed externally of a living body, each fluxmeter including a superconducting quantum interference device (SQUID) for detecting a biomagnetic field generated from said living body, said plurality of fluxmeters being operative to detect a temporal change of a magnetic field component of the biomagnetic field in a first direction which is perpendicular to the surface of said living body; operation processing means for performing computation for determining a magnetic wave form expressing a temporal change of a value proportional to a root of square sum of a differential value of said magnetic field component in a second direction which crosses said first direction and a differential value of said magnetic field component in a third which crosses said first direction and said second direction, and computation for integrating said magnetic wave form within a predetermined time interval to determine an integral value; and display means for displaying said integral value.
Claim 12
Dependent Claim
160 words
A biomagnetic field measuring apparatus comprising: a plurality of fluxmeters disposed externally of a living body, each fluxmeter including a superconducting quantum interference device (SQUID) for detecting a biomagnetic field generated from said living body, said plurality of fluxmeters being operative to detect a temporal change of a magnetic field component of the biomagnetic field in a first direction which is perpendicular to the surface of said living body; operation processing means for performing computation for determining a magnetic wave form expressing a temporal change of a value proportional to a root of square sum of a differential value of said magnetic field component in a second direction which crosses said first direction and a differential value of said magnetic field component in a third which crosses said first direction and said second direction, and computation for integrating said magnetic wave form within a predetermined time interval to determine an integral value; and display means for displaying said integral value.
Claim 13
Dependent Claim
135 words
A biomagnetic field measuring apparatus comprising: a plurality of fluxmeters disposed externally of said living body, each fluxmeter including a superconducting quantum interference device (SQUID) for detecting a biomagnetic field generated from a living body, said plurality of fluxmeters being operative to detect temporal changes of components of the biomagnetic field in first and second directions which are parallel to the surface of said living body and which cross each other; operation processing means for performing computation for determining a magnetic wave form expressing a temporal change of a value proportional to a root of square sum of said first magnetic field component and said second magnetic field component, and computation for integrating said magnetic wave form within a predetermined time interval to determine an integral value; and display means for displaying said integral value.
Claim 14
Dependent Claim
135 words
A biomagnetic field measuring apparatus comprising: a plurality of fluxmeters disposed externally of said living body, each fluxmeter including a superconducting quantum interference device (SQUID) for detecting a biomagnetic field generated from a living body, said plurality of fluxmeters being operative to detect temporal changes of components of the biomagnetic field in first and second directions which are parallel to the surface of said living body and which cross each other; operation processing means for performing computation for determining a magnetic wave form expressing a temporal change of a value proportional to a root of square sum of said first magnetic field component and said second magnetic field component, and computation for integrating said magnetic wave form within a predetermined time interval to determine an integral value; and display means for displaying said integral value.
Claim 15
Dependent Claim
181 words
A biomagnetic field measuring apparatus comprising: a plurality of fluxmeters disposed externally of said living body, each fluxmeter including a superconducting quantum interference device (SQUID) for detecting a biomagnetic field generated from said living body, said plurality of fluxmeters being operative to detect a temporal change of a magnetic field component of the biomagnetic field in a first direction which is perpendicular to the surface of said living body; operation processing means for performing computation for determining a magnetic wave form expressing a temporal change of a value proportional to a root of square sum of a differential value of said magnetic field component in a second direction which crosses said first direction and a differential value of said magnetic field component in a third direction which crosses said first direction and said second direction, computation for integrating said magnetic wave form within a predetermined time interval to determine an integral value, and computation for determining an isointegral map obtained by connecting points at which said integral values are equal to each other; and display means for displaying said isointegral map.
Claim 16
Dependent Claim
181 words
A biomagnetic field measuring apparatus comprising: a plurality of fluxmeters disposed externally of said living body, each fluxmeter including a superconducting quantum interference device (SQUID) for detecting a biomagnetic field generated from said living body, said plurality of fluxmeters being operative to detect a temporal change of a magnetic field component of the biomagnetic field in a first direction which is perpendicular to the surface of said living body; operation processing means for performing computation for determining a magnetic wave form expressing a temporal change of a value proportional to a root of square sum of a differential value of said magnetic field component in a second direction which crosses said first direction and a differential value of said magnetic field component in a third direction which crosses said first direction and said second direction, computation for integrating said magnetic wave form within a predetermined time interval to determine an integral value, and computation for determining an isointegral map obtained by connecting points at which said integral values are equal to each other; and display means for displaying said isointegral map.
Claim 17
Dependent Claim
204 words
A biomagnetic field measuring apparatus comprising: a plurality of fluxmeters disposed externally of said living body, each fluxmeter including a superconducting quantum interference device (SQUID) for detecting a biomagnetic field generated from said living body, said plurality of fluxmeters being operative to detect a temporal change of a magnetic field component of the biomagnetic field in a first direction which is perpendicular to the surface of said living body; operation processing means for performing computation for determining a magnetic wave form expressing a temporal change of a value proportional to a root of square sum of a differential value of said magnetic field component in a second direction which crosses said first direction and a differential value of said magnetic field component in a third direction which crosses said first direction and said second direction, computation for integrating said magnetic wave form within a plurality of predetermined time intervals to determine integral values, computation for obtaining a combined value of any of a ratio, a sum or a difference between two of said integral values, and computation for determining an isointegral map obtained by connecting points at which said combined values are equal to each other; and display means for displaying said isointegral map.
Claim 18
Dependent Claim
204 words
A biomagnetic field measuring apparatus comprising: a plurality of fluxmeters disposed externally of said living body, each fluxmeter including a superconducting quantum interference device (SQUID) for detecting a biomagnetic field generated from said living body, said plurality of fluxmeters being operative to detect a temporal change of a magnetic field component of the biomagnetic field in a first direction which is perpendicular to the surface of said living body; operation processing means for performing computation for determining a magnetic wave form expressing a temporal change of a value proportional to a root of square sum of a differential value of said magnetic field component in a second direction which crosses said first direction and a differential value of said magnetic field component in a third direction which crosses said first direction and said second direction, computation for integrating said magnetic wave form within a plurality of predetermined time intervals to determine integral values, computation for obtaining a combined value of any of a ratio, a sum or a difference between two of said integral values, and computation for determining an isointegral map obtained by connecting points at which said combined values are equal to each other; and display means for displaying said isointegral map.
Claim 19
Dependent Claim
161 words
A biomagnetic field measuring apparatus comprising: a plurality of fluxmeters disposed externally of said living body, each fluxmeter including a superconducting quantum interference device (SQUID) for detecting a biomagnetic field generated from said living body, said plurality of fluxmeters being operative to detect a temporal change of a magnetic field component of the biomagnetic field in a first direction which is perpendicular to the surface of said living body; operation processing means for performing computation for determining a magnetic wave form expressing a temporal change of a value proportional to a root of square sum of a differential value of said magnetic field component in a second direction which crosses said first direction and a differential value of said magnetic field component in a third direction which crosses said first direction and said second direction, and computation for integrating said magnetic wave form within a predetermined time interval to determine an integral value; and display means for displaying said integral value.
Claim 20
Dependent Claim
161 words
A biomagnetic field measuring apparatus comprising: a plurality of fluxmeters disposed externally of said living body, each fluxmeter including a superconducting quantum interference device (SQUID) for detecting a biomagnetic field generated from said living body, said plurality of fluxmeters being operative to detect a temporal change of a magnetic field component of the biomagnetic field in a first direction which is perpendicular to the surface of said living body; operation processing means for performing computation for determining a magnetic wave form expressing a temporal change of a value proportional to a root of square sum of a differential value of said magnetic field component in a second direction which crosses said first direction and a differential value of said magnetic field component in a third direction which crosses said first direction and said second direction, and computation for integrating said magnetic wave form within a predetermined time interval to determine an integral value; and display means for displaying said integral value.
Claim 21
Dependent Claim
164 words
A biomagnetic field measuring apparatus comprising: a plurality of fluxmeters disposed externally of said living body, each fluxmeter including a superconducting quantum interference device (SQUID) for detecting a biomagnetic field generated from said living body, said plurality of fluxmeters being operative to detect a magnetic field component perpendicular to the surface of said living body, wherein a plane parallel to the living body surface corresponds to the x, y plane of a Cartesian coordinate system and a direction vertical to said living body surface corresponds to the z axis of the Cartesian coordinate system; operation processing means for determining a value proportional to a root of square sum of a differential value in the x direction of said magnetic field component and a differential value in the y direction of said magnetic field component, and for determining an isomagnetic field map obtained by connecting points at which said values proportional to said root are equal to each other; and displaying said isomagnetic field map.
Claim 22
Dependent Claim
164 words
A biomagnetic field measuring apparatus comprising: a plurality of fluxmeters disposed externally of said living body, each fluxmeter including a superconducting quantum interference device (SQUID) for detecting a biomagnetic field generated from said living body, said plurality of fluxmeters being operative to detect a magnetic field component perpendicular to the surface of said living body, wherein a plane parallel to the living body surface corresponds to the x, y plane of a Cartesian coordinate system and a direction vertical to said living body surface corresponds to the z axis of the Cartesian coordinate system; operation processing means for determining a value proportional to a root of square sum of a differential value in the x direction of said magnetic field component and a differential value in the y direction of said magnetic field component, and for determining an isomagnetic field map obtained by connecting points at which said values proportional to said root are equal to each other; and displaying said isomagnetic field map.
Claim 23
Dependent Claim
72 words
A biomagnetic field measuring apparatus according to claim 11 , wherein said operation processing means uses, in computation for solving an inverse problem for estimating a position and a magnitude of a magnetic field source within said living body, the number of peaks and position data of said peaks in said isomagnetic field map as initial values of the number of said magnetic field sources and positions of said magnetic field sources.
Claim 24
Dependent Claim
133 words
A biomagnetic field measuring apparatus comprising: a plurality of fluxmeters disposed externally of said living body, each fluxmeter including a superconducting quantum interference device (SQUID) for detecting a biomagnetic field generated from said living body, said plurality of fluxmeters being operative to detect a magnetic field component of the biomagnetic field in a first direction which is perpendicular to the surface of said living body; operation processing means for performing computation for determining a value proportional to a root of square sum of a differential value of said magnetic field component in a second direction which crosses said first direction and a differential value of said magnetic field component in a third direction which crosses said first direction and said second direction; and display means for displaying said value proportional to said root.
Claim 25
Dependent Claim
133 words
A biomagnetic field measuring apparatus comprising: a plurality of fluxmeters disposed externally of said living body, each fluxmeter including a superconducting quantum interference device (SQUID) for detecting a biomagnetic field generated from said living body, said plurality of fluxmeters being operative to detect a magnetic field component of the biomagnetic field in a first direction which is perpendicular to the surface of said living body; operation processing means for performing computation for determining a value proportional to a root of square sum of a differential value of said magnetic field component in a second direction which crosses said first direction and a differential value of said magnetic field component in a third direction which crosses said first direction and said second direction; and display means for displaying said value proportional to said root.
Claim 26
Dependent Claim
126 words
A biomagnetic field measuring apparatus comprising: a plurality of fluxmeters disposed externally of said living body, each fluxmeter including a superconducting quantum interference device (SQUID) for detecting a biomagnetic field generated from said living body, said plurality of fluxmeters being operative to detect a magnetic field component of the biomagnetic field in a first direction which is perpendicular to the surface of said living body; operation processing means for performing computation for determining a root of square sum of a differential value of said magnetic field component in a second direction which crosses said first direction and a differential value of said magnetic field component in a third direction which crosses said first direction and said second direction; and display means for displaying said root value.
Claim 27
Dependent Claim
126 words
A biomagnetic field measuring apparatus comprising: a plurality of fluxmeters disposed externally of said living body, each fluxmeter including a superconducting quantum interference device (SQUID) for detecting a biomagnetic field generated from said living body, said plurality of fluxmeters being operative to detect a magnetic field component of the biomagnetic field in a first direction which is perpendicular to the surface of said living body; operation processing means for performing computation for determining a root of square sum of a differential value of said magnetic field component in a second direction which crosses said first direction and a differential value of said magnetic field component in a third direction which crosses said first direction and said second direction; and display means for displaying said root value.
Claim 28
Dependent Claim
179 words
A biomagnetic field measuring apparatus comprising: a plurality of fluxmeters disposed externally of said living body, each fluxmeter including a superconducting quantum interference device (SQUID) for detecting a biomagnetic field generated from said living body, said plurality of fluxmeters being operative to detect a magnetic field component of the biomagnetic field in a first direction which is perpendicular to the surface of said living body; operation processing means for performing computation for determining a value proportional to a root of square sum of a differential value of said magnetic field component in a second direction which crosses said first direction and a differential value of said magnetic field component in a third direction which crosses said first direction and said second direction; and display means for displaying said value proportional to said root and displaying a first magnitude distribution of the biomagnetic field within a time interval during which the ventricle of the heart of said living body depolarizes and a second magnitude distribution of the biomagnetic field within a time interval during which repolarization of said ventricle proceeds.
Claim 29
Dependent Claim
179 words
A biomagnetic field measuring apparatus comprising: a plurality of fluxmeters disposed externally of said living body, each fluxmeter including a superconducting quantum interference device (SQUID) for detecting a biomagnetic field generated from said living body, said plurality of fluxmeters being operative to detect a magnetic field component of the biomagnetic field in a first direction which is perpendicular to the surface of said living body; operation processing means for performing computation for determining a value proportional to a root of square sum of a differential value of said magnetic field component in a second direction which crosses said first direction and a differential value of said magnetic field component in a third direction which crosses said first direction and said second direction; and display means for displaying said value proportional to said root and displaying a first magnitude distribution of the biomagnetic field within a time interval during which the ventricle of the heart of said living body depolarizes and a second magnitude distribution of the biomagnetic field within a time interval during which repolarization of said ventricle proceeds.
Claim 30
Dependent Claim
181 words
A biomagnetic field measuring method comprising: (1) measuring a first magnetic field component of a biomagnetic field generated from a living body using a plurality of fluxmetersU, each fluxmeter including a superconducting quantum interference device (SQUID), said first magnetic field component being in a first direction which is perpendicular to the surface of said living body; (2) determining a second magnetic field component of the biomagnetic field in a second direction which is orthogonal to said first direction from a differential value in said second direction of said first magnetic field component, and determining a third magnetic field component of the biomagnetic field in a third direction which is orthogonal to said first and second directions from a differential value in said third direction of said first magnetic field component; (3) determining a value proportional to a root square sum of said second magnetic field component and third magnetic field component, and determining an isomagnetic field map obtained by connecting points at which said values proportional to said root are equal to each other; and (4) displaying said isomagnetic field map.
Claim 31
Dependent Claim
181 words
A biomagnetic field measuring method comprising: (1) measuring a first magnetic field component of a biomagnetic field generated from a living body using a plurality of fluxmetersU, each fluxmeter including a superconducting quantum interference device (SQUID), said first magnetic field component being in a first direction which is perpendicular to the surface of said living body; (2) determining a second magnetic field component of the biomagnetic field in a second direction which is orthogonal to said first direction from a differential value in said second direction of said first magnetic field component, and determining a third magnetic field component of the biomagnetic field in a third direction which is orthogonal to said first and second directions from a differential value in said third direction of said first magnetic field component; (3) determining a value proportional to a root square sum of said second magnetic field component and third magnetic field component, and determining an isomagnetic field map obtained by connecting points at which said values proportional to said root are equal to each other; and (4) displaying said isomagnetic field map.
Claim 32
Dependent Claim
202 words
A biomagnetic field measuring method comprising: (1) measuring a first magnetic field component of a biomagnetic field generated from a living body using a plurality of fluxmeters each including a superconducting quantum interference device (SQUID), said first magnetic field component being in a first direction which is perpendicular to the surface of said living body; (2) determining a second magnetic field component of the biomagnetic field in a second direction which is orthogonal to said first direction from a differential value in said second direction of said first magnetic field component, and determining a third magnetic field component of the biomagnetic field in a third direction which is orthogonal to said first and second directions from a differential value in said third direction of said first magnetic field component; (3) determining a value proportional to a root of square sum of said second magnetic field component and third magnetic field component; (4) integrating a magnetic wave form expressing a temporal change of said value in step (3) within a predetermined time interval to determine an integral value, and determining an isointegral map obtained by connecting points at which said integral values are equal to each other; and (5) displaying said isointegral map.
Claim 33
Dependent Claim
202 words
A biomagnetic field measuring method comprising: (1) measuring a first magnetic field component of a biomagnetic field generated from a living body using a plurality of fluxmeters each including a superconducting quantum interference device (SQUID), said first magnetic field component being in a first direction which is perpendicular to the surface of said living body; (2) determining a second magnetic field component of the biomagnetic field in a second direction which is orthogonal to said first direction from a differential value in said second direction of said first magnetic field component, and determining a third magnetic field component of the biomagnetic field in a third direction which is orthogonal to said first and second directions from a differential value in said third direction of said first magnetic field component; (3) determining a value proportional to a root of square sum of said second magnetic field component and third magnetic field component; (4) integrating a magnetic wave form expressing a temporal change of said value in step (3) within a predetermined time interval to determine an integral value, and determining an isointegral map obtained by connecting points at which said integral values are equal to each other; and (5) displaying said isointegral map.
Claim 34
Dependent Claim
137 words
A biomagnetic field measuring method comprising: (1) measuring a normal component of a biomagnetic field generated from a living body by using a plurality of fluxmeters disposed externally of said living body, each fluxmeter including a superconducting quantum interference device (SQUID), said normal component being perpendicular to the surface of said living body; (2) estimating first and second tangential components of the biomagnetic field from said normal component and determining a root of square sum of said first and second tangential components; (3) integrating a magnetic wave form expressing a temporal change of a value proportional to said root of square sum within a predetermined time interval to determine an integral value, and determining an isointegral map obtained by connecting points at which said integral values are equal to each other; and (4) displaying said isointegral map.
Claim 35
Dependent Claim
137 words
A biomagnetic field measuring method comprising: (1) measuring a normal component of a biomagnetic field generated from a living body by using a plurality of fluxmeters disposed externally of said living body, each fluxmeter including a superconducting quantum interference device (SQUID), said normal component being perpendicular to the surface of said living body; (2) estimating first and second tangential components of the biomagnetic field from said normal component and determining a root of square sum of said first and second tangential components; (3) integrating a magnetic wave form expressing a temporal change of a value proportional to said root of square sum within a predetermined time interval to determine an integral value, and determining an isointegral map obtained by connecting points at which said integral values are equal to each other; and (4) displaying said isointegral map.
Claim 36
Dependent Claim
177 words
A biomagnetic field measuring apparatus comprising: a plurality of fluxmeters disposed externally of said living body, each fluxmeter including a superconducting quantum interference device (SQUID) for detecting a biomagnetic field generated from said living body, said plurality of fluxmeters being operative to detect a magnetic field component (B z (x, y, t)) in a z axis direction of said biomagnetic field, wherein a plane parallel to the surface of said living body corresponds to the x, y plane of a Cartesian coordinate system and a direction perpendicular to the living body surface corresponds to the z axis of the Cartesian coordinate system; operation processing means for determining a value proportional to a root of S(x, y, t)={δB z (x, y, t)/δx) 2 +(δB z (x, y, t)/δy) 2 } from said magnetic field component (B z (x, y, t)) in the z axis direction, and for determining an isomagnetic field map obtained by connecting points at which said values proportional to said root are equal to each other; and display means for displaying said isomagnetic field map.
Claim 37
Dependent Claim
177 words
A biomagnetic field measuring apparatus comprising: a plurality of fluxmeters disposed externally of said living body, each fluxmeter including a superconducting quantum interference device (SQUID) for detecting a biomagnetic field generated from said living body, said plurality of fluxmeters being operative to detect a magnetic field component (B z (x, y, t)) in a z axis direction of said biomagnetic field, wherein a plane parallel to the surface of said living body corresponds to the x, y plane of a Cartesian coordinate system and a direction perpendicular to the living body surface corresponds to the z axis of the Cartesian coordinate system; operation processing means for determining a value proportional to a root of S(x, y, t)={δB z (x, y, t)/δx) 2 +(δB z (x, y, t)/δy) 2 } from said magnetic field component (B z (x, y, t)) in the z axis direction, and for determining an isomagnetic field map obtained by connecting points at which said values proportional to said root are equal to each other; and display means for displaying said isomagnetic field map.
Claim 38
Dependent Claim
168 words
A biomagnetic field measuring apparatus comprising: a plurality of fluxmeters disposed externally of said living body, each fluxmeter including a superconducting quantum interference device (SQUID) for detecting a biomagnetic field generated from said living body, said plurality of fluxmeters being operative to detect a magnetic field component (B z (x, y, t)) in a z axis direction of said biomagnetic field, wherein a plane parallel to the surface of said living body corresponds to the x, y plane of a Cartesian coordinate system and a direction perpendicular to the living body surface corresponds to the z axis of the Cartesian coordinate system; operation processing means for determining a value proportional to a root of S ( x, y, t )={δ B z ( x, y, t )/δ x ) 2 +(δ B z ( x, y, t )/δ y ) 2 } from said magnetic field component (B z (x, y, t)) in the z axis direction; and display means for displaying said value proportional to the root.
Claim 39
Dependent Claim
168 words
A biomagnetic field measuring apparatus comprising: a plurality of fluxmeters disposed externally of said living body, each fluxmeter including a superconducting quantum interference device (SQUID) for detecting a biomagnetic field generated from said living body, said plurality of fluxmeters being operative to detect a magnetic field component (B z (x, y, t)) in a z axis direction of said biomagnetic field, wherein a plane parallel to the surface of said living body corresponds to the x, y plane of a Cartesian coordinate system and a direction perpendicular to the living body surface corresponds to the z axis of the Cartesian coordinate system; operation processing means for determining a value proportional to a root of S ( x, y, t )={δ B z ( x, y, t )/δ x ) 2 +(δ B z ( x, y, t )/δ y ) 2 } from said magnetic field component (B z (x, y, t)) in the z axis direction; and display means for displaying said value proportional to the root.
Claim 40
Dependent Claim
217 words
A biomagnetic field measuring apparatus comprising: a plurality of fluxmeters disposed externally of a living body, each fluxmeter including a superconducting quantum interference device (SQUID) for detecting a biomagnetic field generated from said living body, said plurality of fluxmeters being operative to detect a magnetic field component (B z (x, y, t)) in a z axis direction of said biomagnetic field, wherein a plane parallel to the surface of said living body corresponds to the x, y plane of a Cartesian coordinate system and a direction perpendicular to the living body surface corresponds to the z axis of the Cartesian coordinate system; operation processing means for performing computation for determining a value proportional to a root of S ( x, y, t )={δ B z ( x, y, t )/δ x ) 2 +(δ B z ( x, y, t )/δ y ) 2 } from said magnetic field component (B z (x, y, t)) in the z axis direction; and display means for displaying said value proportional to the root and displaying a first magnitude distribution of the biomagnetic field within a time interval during which the ventricle of the heart of said living body depolarizes and a second magnitude distribution of the biomagnetic field within a time interval during which repolarization of said ventricle proceeds.
Claim 41
Dependent Claim
217 words
A biomagnetic field measuring apparatus comprising: a plurality of fluxmeters disposed externally of a living body, each fluxmeter including a superconducting quantum interference device (SQUID) for detecting a biomagnetic field generated from said living body, said plurality of fluxmeters being operative to detect a magnetic field component (B z (x, y, t)) in a z axis direction of said biomagnetic field, wherein a plane parallel to the surface of said living body corresponds to the x, y plane of a Cartesian coordinate system and a direction perpendicular to the living body surface corresponds to the z axis of the Cartesian coordinate system; operation processing means for performing computation for determining a value proportional to a root of S ( x, y, t )={δ B z ( x, y, t )/δ x ) 2 +(δ B z ( x, y, t )/δ y ) 2 } from said magnetic field component (B z (x, y, t)) in the z axis direction; and display means for displaying said value proportional to the root and displaying a first magnitude distribution of the biomagnetic field within a time interval during which the ventricle of the heart of said living body depolarizes and a second magnitude distribution of the biomagnetic field within a time interval during which repolarization of said ventricle proceeds.
Claim 42
Dependent Claim
109 words
A biomagnetic field measuring apparatus comprising: a plurality of fluxmeters disposed externally of said living body, each fluxmeter including a superconducting quantum interference device (SQUID) for detecting a biomagnetic field generated from said living body, said plurality of fluxmeters being operative to detect a normal component of the biomagnetic field perpendicular to the surface of said living body; operation processing means for performing computation for determining a magnitude distribution of said biomagnetic field from two tangential components of said biomagnetic field, said two tangential components being estimated from said normal component measured by said plurality of fluxmeters; and display means for displaying said magnitude distribution of said biomagnetic field.
Claim 43
Dependent Claim
109 words
A biomagnetic field measuring apparatus comprising: a plurality of fluxmeters disposed externally of said living body, each fluxmeter including a superconducting quantum interference device (SQUID) for detecting a biomagnetic field generated from said living body, said plurality of fluxmeters being operative to detect a normal component of the biomagnetic field perpendicular to the surface of said living body; operation processing means for performing computation for determining a magnitude distribution of said biomagnetic field from two tangential components of said biomagnetic field, said two tangential components being estimated from said normal component measured by said plurality of fluxmeters; and display means for displaying said magnitude distribution of said biomagnetic field.
Claim 44
Dependent Claim
30 words
A biomagnetic field measuring apparatus according to claim 22 , wherein said display means displays a magnitude distribution of said biomagnetic field generated from the heart of said living body.
Claim 45
Dependent Claim
158 words
A biomagnetic field measuring apparatus comprising: a plurality of fluxmeters disposed externally of said living body, each fluxmeter including a superconducting quantum interference device (SQUID) for detecting a biomagnetic field generated from said living body, said plurality of fluxmeters being operative to detect a first magnetic field component of said biomagnetic field in a first direction which is perpendicular to the surface of said living body; operation processing means for determining magnetic field components of said biomagnetic field in second and third directions which cross said first direction from said first magnitude field component, and for determining a first magnetic distribution of said biomagnetic field within a time interval during which a QRS wave of a magneticardiogram of said living body appears and a second magnitude distribution of said biomagnetic field within a time interval during which a T wave of a magnetocardiogram appears; and display means for displaying said first magnitude distribution and said second magnitude distribution.
Claim 46
Dependent Claim
158 words
A biomagnetic field measuring apparatus comprising: a plurality of fluxmeters disposed externally of said living body, each fluxmeter including a superconducting quantum interference device (SQUID) for detecting a biomagnetic field generated from said living body, said plurality of fluxmeters being operative to detect a first magnetic field component of said biomagnetic field in a first direction which is perpendicular to the surface of said living body; operation processing means for determining magnetic field components of said biomagnetic field in second and third directions which cross said first direction from said first magnitude field component, and for determining a first magnetic distribution of said biomagnetic field within a time interval during which a QRS wave of a magneticardiogram of said living body appears and a second magnitude distribution of said biomagnetic field within a time interval during which a T wave of a magnetocardiogram appears; and display means for displaying said first magnitude distribution and said second magnitude distribution.
Claim 47
Dependent Claim
31 words
A biomagnetic field measuring apparatus according to claim 24 , wherein said display means displays a magnitude distribution of the difference between said first magnitude distribution and said second magnitude distribution.
Claim 48
Dependent Claim
172 words
A biomagnetic field measuring method comprising: (1) measuring a temporal change of first and second magnetic field components of a biomagnetic field generated from a living body by using a plurality of fluxmeters disposed externally of said living body, each fluxmeter including a superconducting quantum interference device (SQUID), said first and second magnetic field components being in first and second directions which are parallel to the surface of said living body and which cross each other; (2) determining a magnetic wave form expressing a temporal change of a value proportional to a root of square sum of said first magnetic field component and said second magnetic field component; (3) integrating said magnetic wave form within a predetermined time interval to determine a plurality of integral values, computing a combined value of any of a ratio, a sum or a difference between two of said integral values, and determining an isointegral map obtained by connecting points at which said computed combined values are equal to each other; and (4) displaying said isointegral map.
Claim 49
Dependent Claim
172 words
A biomagnetic field measuring method comprising: (1) measuring a temporal change of first and second magnetic field components of a biomagnetic field generated from a living body by using a plurality of fluxmeters disposed externally of said living body, each fluxmeter including a superconducting quantum interference device (SQUID), said first and second magnetic field components being in first and second directions which are parallel to the surface of said living body and which cross each other; (2) determining a magnetic wave form expressing a temporal change of a value proportional to a root of square sum of said first magnetic field component and said second magnetic field component; (3) integrating said magnetic wave form within a predetermined time interval to determine a plurality of integral values, computing a combined value of any of a ratio, a sum or a difference between two of said integral values, and determining an isointegral map obtained by connecting points at which said computed combined values are equal to each other; and (4) displaying said isointegral map.
Claim 50
Dependent Claim
123 words
A biomagnetic field measuring method comprising: (1) measuring a normal component of a biomagnetic field generated from a living body by using a plurality of fluxmeters disposed externally of said living body, each fluxmeter including a superconducting quantum interference device (SQUID), said normal component being perpendicular to the surface of said living body; (2) estimating first and second tangential components of the biomagnetic field from said normal component, and determining a root of square sum of said first and second tangential components; (3) determining a value proportional to said root of square sum, and determining an isomagnetic field map obtained by connecting points at which said values proportional to said root are equal to each other; and (4) displaying said isomagnetic field map.
Claim 51
Dependent Claim
123 words
A biomagnetic field measuring method comprising: (1) measuring a normal component of a biomagnetic field generated from a living body by using a plurality of fluxmeters disposed externally of said living body, each fluxmeter including a superconducting quantum interference device (SQUID), said normal component being perpendicular to the surface of said living body; (2) estimating first and second tangential components of the biomagnetic field from said normal component, and determining a root of square sum of said first and second tangential components; (3) determining a value proportional to said root of square sum, and determining an isomagnetic field map obtained by connecting points at which said values proportional to said root are equal to each other; and (4) displaying said isomagnetic field map.
Claim 52
Dependent Claim
176 words
A biomagnetic field measuring method comprising: (1) measuring a magnetic field component (B z , (x, y, t)) in a z axis direction of a biomagnetic field generated from a living body by using a plurality of fluxmeters disposed externally of said living body, each fluxmeter including a superconducting quantum interference device (SQUID), wherein a plane parallel to the surface of said living body corresponds to the x, y plane of a Cartesian coordinate system and a direction perpendicular to the surface of said living body corresponds to the z axis of the Cartesian coordinate system; (2) determining a value proportional to a root of S ( x, y, t )={{δ B z ( x, y, t )/δ x } 2 +{δB z ( x, y, t )/δ y} 2 } from said magnetic field component (B z (x, y, t)) in the z axis direction, and determining an isomagnetic field map obtained by connecting points at which said values proportional to said root are equal to each other; and (3) displaying said isomagnetic field map.
Claim 53
Dependent Claim
176 words
A biomagnetic field measuring method comprising: (1) measuring a magnetic field component (B z , (x, y, t)) in a z axis direction of a biomagnetic field generated from a living body by using a plurality of fluxmeters disposed externally of said living body, each fluxmeter including a superconducting quantum interference device (SQUID), wherein a plane parallel to the surface of said living body corresponds to the x, y plane of a Cartesian coordinate system and a direction perpendicular to the surface of said living body corresponds to the z axis of the Cartesian coordinate system; (2) determining a value proportional to a root of S ( x, y, t )={{δ B z ( x, y, t )/δ x } 2 +{δB z ( x, y, t )/δ y} 2 } from said magnetic field component (B z (x, y, t)) in the z axis direction, and determining an isomagnetic field map obtained by connecting points at which said values proportional to said root are equal to each other; and (3) displaying said isomagnetic field map.
Claim 54
Dependent Claim
192 words
A biomagnetic field measuring method comprising: (1) measuring a magnetic field component (B z (x, y, t)) in a z axis direction of a biomagnetic field generated from a living body by using a plurality of fluxmeters disposed externally of said living body, each fluxmeter including a superconducting quantum interference device (SQUID), wherein a plane parallel to the surface of said living body corresponds to the x, y plane of a Cartesian coordinate system and a direction perpendicular to the surface of said living body corresponds to the z axis of the Cartesian coordinate system; (2) determining a magnetic wave form expressing a temporal change of a value proportional to a root of S ( x, y, t )=({δ B z ( x, y, t )/δ x} 2 +{δB z ( x, y, t )}/δ y}} from said magnetic field component (B z (x, y, t)) in the z axis direction, and integrating said magnetic wave form within a predetermined time interval to determine an integral value; (3) determining an isointegral map obtained by connecting points at which said integral values are equal to each other; and (4) displaying said isointegral map.
Claim 55
Dependent Claim
192 words
A biomagnetic field measuring method comprising: (1) measuring a magnetic field component (B z (x, y, t)) in a z axis direction of a biomagnetic field generated from a living body by using a plurality of fluxmeters disposed externally of said living body, each fluxmeter including a superconducting quantum interference device (SQUID), wherein a plane parallel to the surface of said living body corresponds to the x, y plane of a Cartesian coordinate system and a direction perpendicular to the surface of said living body corresponds to the z axis of the Cartesian coordinate system; (2) determining a magnetic wave form expressing a temporal change of a value proportional to a root of S ( x, y, t )=({δ B z ( x, y, t )/δ x} 2 +{δB z ( x, y, t )}/δ y}} from said magnetic field component (B z (x, y, t)) in the z axis direction, and integrating said magnetic wave form within a predetermined time interval to determine an integral value; (3) determining an isointegral map obtained by connecting points at which said integral values are equal to each other; and (4) displaying said isointegral map.
Claim 56
Dependent Claim
173 words
A biomagnetic field measuring method comprising: (1) measuring a biomagnetic field generated from a living body by using a plurality of fluxmeters disposed externally of said living body, wherein each of said fluxmeters includes a superconducting quantum interference device (SQUID) and detects temporal changes of components of the biomagnetic field in first and second directions which are in parallel to the surface of said living body and which cross each other; (2) performing computation for determining a magnetic wave form expressing a temporal change of a value proportional to a root of square sum of said first magnetic field component and said second magnetic field component, computation for integrating said magnetic wave form within a plurality of predetermined time intervals to determine integral values, computation for obtaining a combined value of any of a ratio, a sum or a difference between two of said integral values, and computation for determining an isointegral map obtained by connecting points at which said combined values are equal to each other; and (3) displaying said integral value.
Claim 57
Dependent Claim
173 words
A biomagnetic field measuring method comprising: (1) measuring a biomagnetic field generated from a living body by using a plurality of fluxmeters disposed externally of said living body, wherein each of said fluxmeters includes a superconducting quantum interference device (SQUID) and detects temporal changes of components of the biomagnetic field in first and second directions which are in parallel to the surface of said living body and which cross each other; (2) performing computation for determining a magnetic wave form expressing a temporal change of a value proportional to a root of square sum of said first magnetic field component and said second magnetic field component, computation for integrating said magnetic wave form within a plurality of predetermined time intervals to determine integral values, computation for obtaining a combined value of any of a ratio, a sum or a difference between two of said integral values, and computation for determining an isointegral map obtained by connecting points at which said combined values are equal to each other; and (3) displaying said integral value.
Claim 58
Dependent Claim
268 words
A biomagnetic field measuring method comprising: (1) measuring a magnetic field component (B z (x, y, t)) in a z axis direction of a biomagnetic field generated from a living body by using a plurality of fluxmeters disposed externally of said living body, each fluxmeter including a superconducting quantum interference device (SQUID), wherein a plane parallel to the surface of said living body corresponds to the x, y plane of a Cartesian coordinate system and a direction perpendicular to the surface of said living body corresponds to the z axis of the Cartesian coordinate system; (2) determining a magnetic field component (B x (x, y, t)) in the x axis direction from said magnetic field component (B z (x, y, t)) in the z axis direction on the assumption that said magnetic field component (B x (x, y, t)) in the x axis direction is proportional to δB z (x, y, t)/δx, and determining a magnetic field component (B y (x, y, t)) in the y axis direction from said magnetic field component (B z (x, y, t)) in the z axis direction on the assumption that said magnetic field component (B y (x, y, t)) in the y axis direction is proportional to δB z (x, y, t)/δy; and (3) determining a magnetic wave form expressing a temporal change of a value proportional to a root of S ( x, y, t )={{δ B z ( x, y, y )/δ x} 2 +{δB z ( x, y, t )/δ y} 2 } from said magnetic field component (B z (x, y, t)) in the z axis direction.
Claim 59
Dependent Claim
268 words
A biomagnetic field measuring method comprising: (1) measuring a magnetic field component (B z (x, y, t)) in a z axis direction of a biomagnetic field generated from a living body by using a plurality of fluxmeters disposed externally of said living body, each fluxmeter including a superconducting quantum interference device (SQUID), wherein a plane parallel to the surface of said living body corresponds to the x, y plane of a Cartesian coordinate system and a direction perpendicular to the surface of said living body corresponds to the z axis of the Cartesian coordinate system; (2) determining a magnetic field component (B x (x, y, t)) in the x axis direction from said magnetic field component (B z (x, y, t)) in the z axis direction on the assumption that said magnetic field component (B x (x, y, t)) in the x axis direction is proportional to δB z (x, y, t)/δx, and determining a magnetic field component (B y (x, y, t)) in the y axis direction from said magnetic field component (B z (x, y, t)) in the z axis direction on the assumption that said magnetic field component (B y (x, y, t)) in the y axis direction is proportional to δB z (x, y, t)/δy; and (3) determining a magnetic wave form expressing a temporal change of a value proportional to a root of S ( x, y, t )={{δ B z ( x, y, y )/δ x} 2 +{δB z ( x, y, t )/δ y} 2 } from said magnetic field component (B z (x, y, t)) in the z axis direction.
Claim 60
Dependent Claim
55 words
A biomagnetic field measuring method according to claim 31 , further comprising the steps: (4) integrating said magnetic wave form within a predetermined time interval to determine an integral value; (5) determining an isointegral map obtained by connecting points at which said integral values are equal to each other; and (6) displaying said isointegral map.
Claim 61
Dependent Claim
44 words
A biomagnetic field measuring method according to claim 31 , further comprising the steps: (4) determining an isomagnetic field map obtained by connecting points at which said values proportional to said root are equal to each other; and (5) displaying said isomagnetic field map.
Claim 62
Dependent Claim
209 words
A biomagnetic field measuring method comprising: (1) measuring a magnetic field component (B z (x, y, t)) in the z axis direction of a biomagnetic field generated from a living body by using a plurality of fluxmeters disposed externally of said living body, each fluxmeter including a superconducting quantum interference device (SQUID), wherein a plane parallel to the surface of said living body corresponds to the x, y plane of a Cartesian coordinate system and a direction perpendicular to the surface of said living body corresponds to z axis of the Cartesian coordinate system; and (2) determining a magnetic field component (B x (x, y, t)) in the x axis direction from said magnetic field component (B z (x, y, t)) in the z axis direction on the assumption that said magnetic field component (B x (x, y, t)) in the x axis direction is proportional to δB z (x, y, t)/δx, and determining a magnetic field component (B y (x, y, t)) in the y axis direction from said magnetic field component (B z (x, y, t)) in the z axis direction on the assumption that said magnetic field component (B y (x, y, t)) in the y axis direction is proportional to δB z (x, y, t)/δy.
Claim 63
Dependent Claim
209 words
A biomagnetic field measuring method comprising: (1) measuring a magnetic field component (B z (x, y, t)) in the z axis direction of a biomagnetic field generated from a living body by using a plurality of fluxmeters disposed externally of said living body, each fluxmeter including a superconducting quantum interference device (SQUID), wherein a plane parallel to the surface of said living body corresponds to the x, y plane of a Cartesian coordinate system and a direction perpendicular to the surface of said living body corresponds to z axis of the Cartesian coordinate system; and (2) determining a magnetic field component (B x (x, y, t)) in the x axis direction from said magnetic field component (B z (x, y, t)) in the z axis direction on the assumption that said magnetic field component (B x (x, y, t)) in the x axis direction is proportional to δB z (x, y, t)/δx, and determining a magnetic field component (B y (x, y, t)) in the y axis direction from said magnetic field component (B z (x, y, t)) in the z axis direction on the assumption that said magnetic field component (B y (x, y, t)) in the y axis direction is proportional to δB z (x, y, t)/δy.
Claim 64
Dependent Claim
113 words
A biomagnetic field measuring method according to claim 34 , further comprising the steps: (3) determining a magnetic wave form expressing a temporal change of a value proportional to a root of S ( x, y, t )={{δ B z ( x, y, t )/δ x} 2 +{δB z ( x, y, t )/δ y} 2 } from said magnetic field component (B z (x, y, t)) in the z axis direction; (4) integrating said magnetic wave form within a predetermined time interval to determine an integral value; (5) determining an isointegral map obtained by connecting points at which said integral values are equal to each other; and (6) displaying said isointegral map.
Claim 65
Dependent Claim
102 words
A biomagnetic field measuring method according to claim 34 , further comprising the steps: (3) determining a magnetic wave form expressing a temporal change of a value proportional to a root of S ( x, y, t )={{δ B z ( x, y, t )/δ x} 2 +{δB z ( x, y, t )/δ y} 2 } from said magnetic field component (B z (x, y, t)) in the z axis direction; (4) determining an isomagnetic field map obtained by connecting points at which said values proportional to said root are equal to each other; and (5) displaying said isomagnetic field map.
Claim 66
Dependent Claim
143 words
A biomagnetic field measuring method comprising: (1) measuring a magnetic field component (B z (x, y, t)) in the z axis direction of a biomagnetic field generated from a living body by using a plurality of fluxmeters disposed externally of said living body, each fluxmeter including a superconducting quantum interference device (SQUID), wherein a plane parallel to the surface of said living body corresponds to the x, y plane of a Cartesian coordinate system and a direction perpendicular to the surface of said living body corresponds to the z axis of the Cartesian coordinate system; and (2) estimating a magnetic field component (B x (x, y, t)) in the x axis direction and a magnetic field component (B y (x, y, t)) in the y axis direction based on said magnetic field component (B z (x, y, t)) in the z axis direction.
Claim 67
Dependent Claim
143 words
A biomagnetic field measuring method comprising: (1) measuring a magnetic field component (B z (x, y, t)) in the z axis direction of a biomagnetic field generated from a living body by using a plurality of fluxmeters disposed externally of said living body, each fluxmeter including a superconducting quantum interference device (SQUID), wherein a plane parallel to the surface of said living body corresponds to the x, y plane of a Cartesian coordinate system and a direction perpendicular to the surface of said living body corresponds to the z axis of the Cartesian coordinate system; and (2) estimating a magnetic field component (B x (x, y, t)) in the x axis direction and a magnetic field component (B y (x, y, t)) in the y axis direction based on said magnetic field component (B z (x, y, t)) in the z axis direction.
Claim 68
Dependent Claim
83 words
A biomagnetic field measuring method comprising: (1) measuring a normal component of a biomagnetic field generated from a living body by using a plurality of fluxmeters disposed externally of said living body, each fluxmeter including a superconducting quantum interference device (SQUID), said normal component being perpendicular to the surface of said living body; and (2) estimating first and second tangential components of the biomagnetic field from said normal component and determining a root of square sum of said first and second tangential components.
Claim 69
Dependent Claim
83 words
A biomagnetic field measuring method comprising: (1) measuring a normal component of a biomagnetic field generated from a living body by using a plurality of fluxmeters disposed externally of said living body, each fluxmeter including a superconducting quantum interference device (SQUID), said normal component being perpendicular to the surface of said living body; and (2) estimating first and second tangential components of the biomagnetic field from said normal component and determining a root of square sum of said first and second tangential components.
Claim 70
Dependent Claim
214 words
A biomagnetic field measuring method comprising: (1) measuring a magnetic field component (B x (x, y, t)) in the x axis direction and a magnetic field component (B y (x, y, t)) in the y axis direction of a biomagnetic field generated from a living body by using a plurality of fluxmeters disposed externally of said living body, each fluxmeter including a superconducting quantum interference device (SQUID), wherein a plane parallel to the surface of said living body corresponds to the x, y plane of a Cartesian coordinate system and a direction vertical to the surface of said living body corresponds to the z axis of the Cartesian coordinate system; (2) determining a magnetic wave form expressing a temporal change of a value proportional to a root of B xy ( x, y, t )={ B x ( x, y, t )} 2 +{B y ( x, y, t )} 2 from said magnetic field components (B x (x, y, t), B y (x, y, t)) in the x and y axis directions, and integrating said magnetic wave form within a predetermined time interval to determine an integral value; (3) determining an isointegral map obtained by connecting points at which said integral values are equal to each other; and (4) displaying said isointegral map.
Claim 71
Dependent Claim
214 words
A biomagnetic field measuring method comprising: (1) measuring a magnetic field component (B x (x, y, t)) in the x axis direction and a magnetic field component (B y (x, y, t)) in the y axis direction of a biomagnetic field generated from a living body by using a plurality of fluxmeters disposed externally of said living body, each fluxmeter including a superconducting quantum interference device (SQUID), wherein a plane parallel to the surface of said living body corresponds to the x, y plane of a Cartesian coordinate system and a direction vertical to the surface of said living body corresponds to the z axis of the Cartesian coordinate system; (2) determining a magnetic wave form expressing a temporal change of a value proportional to a root of B xy ( x, y, t )={ B x ( x, y, t )} 2 +{B y ( x, y, t )} 2 from said magnetic field components (B x (x, y, t), B y (x, y, t)) in the x and y axis directions, and integrating said magnetic wave form within a predetermined time interval to determine an integral value; (3) determining an isointegral map obtained by connecting points at which said integral values are equal to each other; and (4) displaying said isointegral map.
Claim 72
Dependent Claim
241 words
A biomagnetic field measuring apparatus comprising: a plurality of fluxmeters disposed externally of said living body, each fluxmeter including a superconducting quantum interference device (SQUID) for detecting a biomagnetic field generated from said living body, said plurality of fluxmeters being operative to detect a magnetic field component of the biomagnetic field in a first direction which is perpendicular to the surface of said living body; operation processing means for performing computation for determining a magnetic wave form expressing a temporal change of a value proportional to a root of square sum of a differential value of said magnetic field component in a second direction which crosses said first direction and a differential value of said magnetic field component in a third direction which crosses said first direction and said second direction, computation for integrating said magnetic wave form within a time interval during which the ventricle of the heart of said living body depolarizes to determine a first integral value, computation for integrating said magnetic wave form within a time interval during which the repolarization of said ventricle proceeds to determine a second integral value, computation for determining a first isointegral map obtained by connecting points at which said first integral values are equal to each other, and computation for determining a second isointegral map obtained by connecting points at which said second integral values are equal to each other; and display means for displaying said first and second isointegral maps.
Claim 73
Dependent Claim
241 words
A biomagnetic field measuring apparatus comprising: a plurality of fluxmeters disposed externally of said living body, each fluxmeter including a superconducting quantum interference device (SQUID) for detecting a biomagnetic field generated from said living body, said plurality of fluxmeters being operative to detect a magnetic field component of the biomagnetic field in a first direction which is perpendicular to the surface of said living body; operation processing means for performing computation for determining a magnetic wave form expressing a temporal change of a value proportional to a root of square sum of a differential value of said magnetic field component in a second direction which crosses said first direction and a differential value of said magnetic field component in a third direction which crosses said first direction and said second direction, computation for integrating said magnetic wave form within a time interval during which the ventricle of the heart of said living body depolarizes to determine a first integral value, computation for integrating said magnetic wave form within a time interval during which the repolarization of said ventricle proceeds to determine a second integral value, computation for determining a first isointegral map obtained by connecting points at which said first integral values are equal to each other, and computation for determining a second isointegral map obtained by connecting points at which said second integral values are equal to each other; and display means for displaying said first and second isointegral maps.
Claim 74
Dependent Claim
276 words
A biomagnetic field measuring apparatus comprising: a plurality of fluxmeters disposed externally of said living body, each fluxmeter including a superconducting quantum interference device (SQUID) for detecting a biomagnetic field generated from said living body, said plurality of fluxmeters being operative to detect a magnetic field component (B z (x, y, t)) in the z axis direction of said biomagnetic field, wherein a plane parallel to the surface of said living body corresponds to the x, y plane of a Cartesian coordinate system and a direction perpendicular to the living body surface corresponds to the z axis of the Cartesian coordinate system; operation processing means for performing computation for determining a magnetic wave form expressing a temporal change of a value proportional to a root of S ( x, y, t )={{δ B z ( x, y, t )/δ x} 2 +{δB z ( x, y, t )/δ y} 2 } from said magnetic field component (B z (x, y, t)) in the z axis direction, computation for integrating said magnetic wave form within a time interval during which the ventricle of the heart of said living body depolarizes to determine a first integral value, computation for integrating said magnetic wave form within a time interval during which the repolarization of said ventricle proceeds to determine a second integral value, computation for determining a first isointegral map obtained by connecting points at which said first integral values are equal to each other, and computation for determining a second isointegral map obtained by connecting points at which said second integral values are equal to each other; and display means for displaying said first and second isointegral maps.
Claim 75
Dependent Claim
276 words
A biomagnetic field measuring apparatus comprising: a plurality of fluxmeters disposed externally of said living body, each fluxmeter including a superconducting quantum interference device (SQUID) for detecting a biomagnetic field generated from said living body, said plurality of fluxmeters being operative to detect a magnetic field component (B z (x, y, t)) in the z axis direction of said biomagnetic field, wherein a plane parallel to the surface of said living body corresponds to the x, y plane of a Cartesian coordinate system and a direction perpendicular to the living body surface corresponds to the z axis of the Cartesian coordinate system; operation processing means for performing computation for determining a magnetic wave form expressing a temporal change of a value proportional to a root of S ( x, y, t )={{δ B z ( x, y, t )/δ x} 2 +{δB z ( x, y, t )/δ y} 2 } from said magnetic field component (B z (x, y, t)) in the z axis direction, computation for integrating said magnetic wave form within a time interval during which the ventricle of the heart of said living body depolarizes to determine a first integral value, computation for integrating said magnetic wave form within a time interval during which the repolarization of said ventricle proceeds to determine a second integral value, computation for determining a first isointegral map obtained by connecting points at which said first integral values are equal to each other, and computation for determining a second isointegral map obtained by connecting points at which said second integral values are equal to each other; and display means for displaying said first and second isointegral maps.
Claim 76
Dependent Claim
210 words
A biomagnetic field measuring apparatus comprising: a plurality of fluxmeters disposed externally of said living body, each fluxmeter including a superconducting quantum interference device (SQUID) for detecting a biomagnetic field generated from said living body, said plurality of fluxmeters being operative to detect a magnetic field component (B z (x, y, t)) in the z axis direction of said biomagnetic field, wherein a plane parallel to the surface of said living body corresponds to the x, y plane of a Cartesian coordinate system and a direction perpendicular to the living body surface corresponds to the z axis of the Cartesian coordinate system; operation processing means for performing computation for determining a magnetic wave form expressing a temporal change of a value proportional to a root of S ( x, y, t )={{δ B z ( x, y, t )/δ x} 2 +{δB z ( x, y, t/δy)} 2 } from said magnetic field component (B z (x, y, t)) in the z axis direction, computation for integrating said magnetic wave form within a predetermined time interval to determine an integral value, and computation for determining an isointegral map obtained by connecting points at which said integral values are equal to each other; and displaying means for displaying said isointegral map.
Claim 77
Dependent Claim
210 words
A biomagnetic field measuring apparatus comprising: a plurality of fluxmeters disposed externally of said living body, each fluxmeter including a superconducting quantum interference device (SQUID) for detecting a biomagnetic field generated from said living body, said plurality of fluxmeters being operative to detect a magnetic field component (B z (x, y, t)) in the z axis direction of said biomagnetic field, wherein a plane parallel to the surface of said living body corresponds to the x, y plane of a Cartesian coordinate system and a direction perpendicular to the living body surface corresponds to the z axis of the Cartesian coordinate system; operation processing means for performing computation for determining a magnetic wave form expressing a temporal change of a value proportional to a root of S ( x, y, t )={{δ B z ( x, y, t )/δ x} 2 +{δB z ( x, y, t/δy)} 2 } from said magnetic field component (B z (x, y, t)) in the z axis direction, computation for integrating said magnetic wave form within a predetermined time interval to determine an integral value, and computation for determining an isointegral map obtained by connecting points at which said integral values are equal to each other; and displaying means for displaying said isointegral map.
Claim 78
Dependent Claim
20 words
A biomagnetic field measuring apparatus according to claim 42 , wherein said plurality of fluxmeters are disposed at equal intervals.
Claim 79
Dependent Claim
37 words
A biomagnetic field measuring apparatus according to claim 42 , wherein coloring is effected on said display means in accordance with a level of a contour line of said isointegral map to provide a three-dimensional color display.
Claim 80
Dependent Claim
27 words
A biomagnetic field measuring apparatus according to claim 42 , wherein an electrocardiogram is displayed on said display means at the same time as said isointegral map.
Claim 81
Dependent Claim
221 words
A biomagnetic field measuring apparatus comprising: a plurality of fluxmeters disposed externally of said living body, each fluxmeter including a superconducting quantum interference device (SQUID) for detecting a biomagnetic field generated from said living body, said plurality of fluxmeters being operative to detect a magnetic field component (B z (x, y, t)) in the z axis direction of said biomagnetic field, wherein a plane parallel to the surface of said living body corresponds to the x, y plane of a Cartesian coordinate system and a direction perpendicular to the living body surface corresponds to the z axis of the Cartesian coordinate system; and operation processing means for determining a magnetic field component (B x (x, y, t)) in the x axis direction from said magnetic field component (B z (x, y, t)) in the z axis direction on the assumption that said magnetic field component (B x (x, y, t)) in the x axis direction is proportional to δB z (x, y, t)/δx, and for determining a magnetic field component (B y (x, y, t)) in the y axis direction from said magnetic field component (B z (x, y, t)) in the z axis direction on the assumption that said magnetic field component (B y (x, y, t)) in the y axis direction is proportional to δB z (x, y, t)/δy.
Claim 82
Dependent Claim
221 words
A biomagnetic field measuring apparatus comprising: a plurality of fluxmeters disposed externally of said living body, each fluxmeter including a superconducting quantum interference device (SQUID) for detecting a biomagnetic field generated from said living body, said plurality of fluxmeters being operative to detect a magnetic field component (B z (x, y, t)) in the z axis direction of said biomagnetic field, wherein a plane parallel to the surface of said living body corresponds to the x, y plane of a Cartesian coordinate system and a direction perpendicular to the living body surface corresponds to the z axis of the Cartesian coordinate system; and operation processing means for determining a magnetic field component (B x (x, y, t)) in the x axis direction from said magnetic field component (B z (x, y, t)) in the z axis direction on the assumption that said magnetic field component (B x (x, y, t)) in the x axis direction is proportional to δB z (x, y, t)/δx, and for determining a magnetic field component (B y (x, y, t)) in the y axis direction from said magnetic field component (B z (x, y, t)) in the z axis direction on the assumption that said magnetic field component (B y (x, y, t)) in the y axis direction is proportional to δB z (x, y, t)/δy.
Claim 83
Dependent Claim
153 words
A biomagnetic field measuring apparatus comprising: a plurality of fluxmeters disposed externally of said living body, each fluxmeter including a superconducting quantum interference device (SQUID) for detecting a biomagnetic field generated from said living body, said plurality of fluxmeters being operative to detect a magnetic field component (B z (x, y, t)) in the z axis direction of said biomagnetic field, wherein a plane parallel to the surface of said living body corresponds to the X, y plane of a Cartesian coordinate system and a direction perpendicular to the living body surface corresponds to the z axis of the Cartesian coordinate system; and operation processing means for estimating a magnetic field component (B x (x, y, t)) in the x axis direction and a magnetic field component (B y (x, y, t)) in the y axis direction based on said magnetic field component (B z (x, y, t)) in the z axis direction.
Claim 84
Dependent Claim
153 words
A biomagnetic field measuring apparatus comprising: a plurality of fluxmeters disposed externally of said living body, each fluxmeter including a superconducting quantum interference device (SQUID) for detecting a biomagnetic field generated from said living body, said plurality of fluxmeters being operative to detect a magnetic field component (B z (x, y, t)) in the z axis direction of said biomagnetic field, wherein a plane parallel to the surface of said living body corresponds to the X, y plane of a Cartesian coordinate system and a direction perpendicular to the living body surface corresponds to the z axis of the Cartesian coordinate system; and operation processing means for estimating a magnetic field component (B x (x, y, t)) in the x axis direction and a magnetic field component (B y (x, y, t)) in the y axis direction based on said magnetic field component (B z (x, y, t)) in the z axis direction.
Claim 85
Dependent Claim
232 words
A biomagnetic field measuring apparatus comprising: a plurality of fluxmeters disposed externally of said living body, each fluxmeter including a superconducting quantum interference device (SQUID) for detecting a biomagnetic field generated from said living body, said plurality of fluxmeters being operative to detect a magnetic field component B x (x, y, t)) in the x axis direction and a magnetic field component B y (x, y, t)) in the y axis direction of said biomagnetic field, wherein a plane parallel to the surface of said living body corresponds to the x, y plane of a Cartesian coordinate system and a direction perpendicular to the living body surface corresponds to the z axis of the Cartesian coordinate system; operation processing means for performing computation for determining a magnetic wave form expressing a temporal change of a value proportional to a root of B x,y ( x, y, t )={ B x ( x, y, t )} 2 +{B y ( x, y, t )} 2 from said magnetic field components (B x (x, y, t), B y (x, y, t)) in the x and y axis directions, computation for integrating said magnetic wave form within a predetermined time interval to determine an integral value, and computation for determining an isointegral map obtained by connecting points at which said integral values are equal to each other; and display means for displaying said isointegral map.
Claim 86
Dependent Claim
232 words
A biomagnetic field measuring apparatus comprising: a plurality of fluxmeters disposed externally of said living body, each fluxmeter including a superconducting quantum interference device (SQUID) for detecting a biomagnetic field generated from said living body, said plurality of fluxmeters being operative to detect a magnetic field component B x (x, y, t)) in the x axis direction and a magnetic field component B y (x, y, t)) in the y axis direction of said biomagnetic field, wherein a plane parallel to the surface of said living body corresponds to the x, y plane of a Cartesian coordinate system and a direction perpendicular to the living body surface corresponds to the z axis of the Cartesian coordinate system; operation processing means for performing computation for determining a magnetic wave form expressing a temporal change of a value proportional to a root of B x,y ( x, y, t )={ B x ( x, y, t )} 2 +{B y ( x, y, t )} 2 from said magnetic field components (B x (x, y, t), B y (x, y, t)) in the x and y axis directions, computation for integrating said magnetic wave form within a predetermined time interval to determine an integral value, and computation for determining an isointegral map obtained by connecting points at which said integral values are equal to each other; and display means for displaying said isointegral map.
Claim 87
Dependent Claim
20 words
A biomagnetic field measuring apparatus according to claim 48 , wherein said plurality of fluxmeters are arranged at equal intervals.
References Cited (Backward Citations)
US5285385A
Cited
JPH02249530A
Cited
US5170119A
Cited
US5204624A
Cited
US5206589A
Cited
US5211178A
Cited
US5426365A
Cited
US5228443A
Cited
US5526811A
Cited
US5752514A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2004-05-07 | 2004-11-06 | 2005-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-05-07 | 2008-11-06 | 2009-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-05-07 | 2012-11-06 | 2013-05-08 | $7700.00 | Window Closed / Lapsed |