EP0576016A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Diagnostic system using nuclear magnetic resonance phenomenon
Assignee: Olympus Corp
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Filing: 1993-06-24
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Granted: —
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Expires: 2013-06-24
Abstract
Abstract A diagnostic system a nuclear magnetic resonance phenomenon comprises an external magnetic field generator (1), provided externally, for generating a magnetic field in a living body, a thin diameter member (5) capable of inserting to a body cavity and having flexibility, a high frequency coil (6), provided at a top end of the thin diameter member (5), for transmitting and receiving a high frequency, a nuclear magnetic resonance signal measuring device (2) for receiving a nuclear magnetic resonance signal from the living body, and a transformer (12), provided between the high frequency coil (6) and the nuclear magnetic resonance signal measuring device (2), for electrically insulating and separating both high frequency coil (6) and nuclear magnetic resonance signal measuring device (2) in a manner that the nuclear magnetic resonance signal is transmittable between the high frequency coil (6) and the nuclear magnetic resonance signal measuring device (2).
Inventors
- 👤 Koji c/o Int. Prop. & Legal Dept. Fujio
- 👤 Masakazu c/o Int. Prop. & Legal Dept. Gotanda
- 👤 Tatsuya c/o Int. Prop. & Legal Dept. Yamaguchi
- 👤 Shuichi c/o Int. Prop. & Legal Dept. Takayama
- 👤 Takashi c/o Int. Prop. & Legal Dept. Tsukaya
- 👤 Toshihiko c/o Int. Prop. & Legal Dept. Hagiwara
- 👤 Koichi c/o Int. Prop. & Legal Dept. Matsui
- 👤 Hiroki c/o Int. Prop. & Legal Dept. Hibino
- 👤 Keiichi c/o Int. Prop. & Legal Dept. Hiyama
- 👤 Koichi c/o Int. Prop. & Legal Dept. Shimizu
- 👤 Kenji c/o Int. Prop. & Legal Dept. Yoshino
- 👤 Masaaki c/o Int. Prop. & Legal Dept. Hayashi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 04:46
CPC Classifications
G; G01; G01R; G01R33/00; G01R33/20; G01R33/28; G01R33/32; G01R33/34; G01R33/34084; A; A61; A61B; A61B5/00; A61B5/05; A61B5/055; G01R33/285; G01R33/288; G01R33/36; G01R33/3642; G01R33/3657
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
154 words
A diagnostic system using a nuclear magnetic resonance phenomenon comprising: an external magnetic field generator (1), provided externally, for generating a magnetic field in a living body; a thin diameter member (5) capable of inserting to a body cavity and having flexibility; a high frequency coil (6), provided at a top end of said thin diameter member (5), for transmitting and receiving a high frequency; and a nuclear magnetic resonance signal measuring device (2) for receiving a nuclear magnetic resonance signal from the living body characterized in that insulating and separating means (12) is provided between said high frequency coil (6) and said nuclear magnetic resonance signal measuring device (2), for electrically insulating and separating both high frequency coil (6) and nuclear magnetic resonance signal measuring device (2) in a manner that the nuclear magnetic resonance signal is transmittable between said high frequency coil (6) and said nuclear magnetic resonance signal measuring device (2).
Claim 2
Dependent Claim
26 words
The system according to claim 1, characterized in that an amplifying means (9) is provided for amplifying the signal received by said high frequency coil (6).
Claim 3
Dependent Claim
53 words
The system according to claim 2, characterized in that said insulating/separating means comprises a high frequency transducer (12) having a first wire connected to said nuclear magnetic resonance signal measuring device (2), and a second wire connected to an output side of said amplifying means (9) and electrically insulated from said first wire.
Claim 4
Dependent Claim
27 words
The system according to claim 3, characterized in that a stabilizing d.c. power source (13) is provided for supplying a bias voltage to said amplifying means (9).
Claim 5
Dependent Claim
42 words
The system according to claim 2, characterized in that said amplifying means (9) has a pre-amplifier (9), and said insulating and separating means has an isolation amplifier (14) provided between said pre-amplifier (9) and said nuclear magnetic resonance signal measuring device (2).
Claim 6
Dependent Claim
31 words
The system according to claim 5, characterized in that a stabilizing d.c. power source (13) is provided for supplying a bias voltage to said pre-amplifier (9) and said isolation amplifier (14).
Claim 7
Dependent Claim
17 words
The system according to claim 1, characterized in that said thin diameter member is an endoscope (5).
Claim 8
Dependent Claim
113 words
A diagnostic system using a nuclear magnetic resonance phenomenon comprising: a control section (31, 31a) internally provided; an inserting section (32, 32a) of thin diameter, extended from said control section, capable of inserting to a body cavity and having flexibility; an endoscope (21) having a high frequency antenna (56) provided in said insertion section; and a plurality of magnetic resonance signal measuring devices (22) for processing a nuclear magnetic resonance signal from said high frequency antenna (56) characterized in that matching means (57;58a, 58b, 58c) is provided for selectively making said high frequency antenna (56) connectable to each of said plurality of magnetic resonance signal measuring device (22) having a different circuit characteristic.
Claim 9
Dependent Claim
59 words
The system according to claim 8, characterized in that said antenna (56) is a loop antenna, and said matching means has a variable capacitor (66) connected to said antenna (56) in parallel and a variable capacitor (67) connected to said antenna (56) in series, and impedance-matches said antenna (56) and each of said magnetic resonance signal measuring device (22).
Claim 10
Dependent Claim
23 words
The system according to claim 9, characterized in that said matching means has a diode (68) arranged in parallel to the loop antenna.
Claim 11
Dependent Claim
31 words
The system according to claim 9, characterized in that adjusting means (60) is provided in said control section (31) to adjust the capacity of each of said variable capacitors (66, 67).
Claim 12
Dependent Claim
55 words
The system according to claim 11, characterized in that said each of magnetic resonance signal measuring device (22) forms a signal showing a matching state between said matching means (57) and each of said magnetic resonance signal measuring device (22) when receiving each magnetic resonance signal from said antenna (56) through said matching means (57).
Claim 13
Dependent Claim
36 words
The system according to claim 12, characterized in that an adjusting means controlling device (69) is provided to receive said signal showing the matching state, and to actuate said adjusting means (60) based on said signal.
Claim 14
Dependent Claim
56 words
The system according to claim 8, characterized in that each of said matching means is connected to said antenna (56), and has a plurality of pre-amplifiers (38a, 38b, 38c) having a different circuit characteristic, and each of said pre-amplifiers is connectable to each of said magnetic resonance signal measuring devices (22) having a corresponding circuit characteristic.
Claim 15
Dependent Claim
37 words
The system according to claim 14, characterized in that said endoscope (21) has a universal code (33a) extended from the controller (31a), and a signal line passage (37) extended to the universal code from said antenna (56).
Claim 16
Dependent Claim
82 words
The system according to claim 15, characterized in that said endoscope (21) has a light guide (59), contained in the insertion section (32a), for illuminating an illumination light to a portion of an object to be examined from an end surface (52) of the insertion section, and an objective optical system (37) for image-forming light reflected from the portion of the object to be examined, and said light guide (50) is extended to said universal code (33a) from the insertion section (32).
Claim 17
Dependent Claim
67 words
The system according to claim 16, characterized in that said endoscope (21) has an image-forming device (38), contained in the insertion section (32a), for converting the image image-formed by said objective optical system to an electrical signal, and a signal line passage (39) connected to said image-forming device at its one end, and extended to the inside portion between said insertion section (32a) and universal code (33a).
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