US5144243A
Expired / Lapsed
US
⏱️ 0.0 years remaining
RF coil system for use in magnetic resonance imaging apparatus
Assignee: Toshiba Corp
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Filing: 1991-02-13
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Granted: 1992-09-01
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Expires: 2011-02-13
Abstract
Abstract An RF coil system, used for a magnetic resonance imaging apparatus and adapted to perform at least one of application of an excitation high-frequency magnetic field and detection of magnetic resonance signals, comprises a plurality of coil elements arranged at regularly spaced intervals without overlap therebetween, an RF circuit for putting at least one of the coil elements into an operative state or an inoperative state, a neutralizing circuit for neutralizing inductive coupling between the coil elements, a tuning circuit for tuning at least one of the coil elements to a given frequency, an adder circuit for adding an output signal of the tuning circuit and conductors for electrically connecting the coil elements, the RF circuit, the neutralizing circuit and the adder circuit.
Inventors
- 👤 Kazuto Nakabayashi
- 👤 Timothy R. Fox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:52
CPC Classifications
G; G01; G01R; G01R33/00; G01R33/20; G01R33/28; G01R33/32; G01R33/34; G01R33/341; G01R33/3415
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
72 words
An RF coil system for use in a magnetic resonance imaging apparatus, said coil system being adapted to perform at least one of application of an excitation high-frequency magnetic field and detection of magnetic resonance signals, comprising: a plurality of coil elements arranged at regularly spaced intervals without any overlap between said coil elements; and means for putting each of said coil elements into an operative state or an inoperative state individually.
Claim 2
Dependent Claim
72 words
An RF coil system for use in a magnetic resonance imaging apparatus, said coil system being adapted to perform at least one of application of an excitation high-frequency magnetic field and detection of magnetic resonance signals, comprising: a plurality of coil elements arranged at regularly spaced intervals without any overlap between said coil elements; and means for putting each of said coil elements into an operative state or an inoperative state individually.
Claim 3
Dependent Claim
27 words
An RF coil system according to claim 1, in which said coil elements are arranged at intervals of about one centimeters without overlap between said coil elements.
Claim 4
Dependent Claim
30 words
An RF coil system according to claim 1, in which said coil elements are arranged on a top board of a bed on which a subject under examination is placed.
Claim 5
Dependent Claim
25 words
An RF coil system according to claim 1, in which each of said coil elements incorporates a marker adapted to produce a magnetic resonance signal.
Claim 6
Dependent Claim
46 words
An RF coil system according to claim 1, in which said coil elements are arranged on a top board of a bed on which a subject under examination is placed and each of said coil elements incorporates a marker adapted to produce a magnetic resonance signal.
Claim 7
Dependent Claim
90 words
An RF coil system for use in a magnetic resonance imaging apparatus, said coil system being adapted to perform at least one of application of an excitation high-frequency magnetic field and detection of magnetic resonance signals, comprising: a plurality of coil elements arranged at regularly spaced intervals without any overlap between said coil elements; means for putting each of said coil elements into an operative state or an inoperative state individually; and neutralizing means installed between adjacent ones of said coil elements for neutralizing inductive coupling between said coil elements.
Claim 8
Dependent Claim
90 words
An RF coil system for use in a magnetic resonance imaging apparatus, said coil system being adapted to perform at least one of application of an excitation high-frequency magnetic field and detection of magnetic resonance signals, comprising: a plurality of coil elements arranged at regularly spaced intervals without any overlap between said coil elements; means for putting each of said coil elements into an operative state or an inoperative state individually; and neutralizing means installed between adjacent ones of said coil elements for neutralizing inductive coupling between said coil elements.
Claim 9
Dependent Claim
27 words
An RF coil system according to claim 6, in which said coil elements are arranged at intervals of about one centimeters without overlap between said coil elements.
Claim 10
Dependent Claim
30 words
An RF coil system according to claim 6, in which said coil elements are arranged on a top board of a bed on which a subject under examination is placed.
Claim 11
Dependent Claim
25 words
An RF coil system according to claim 6, in which each of said coil elements incorporates a marker adapted to produce a magnetic resonance signal.
Claim 12
Dependent Claim
46 words
An RF coil system according to claim 6, in which said coil elements are arranged on a top board of a bed on which a subject under examination is placed and each of said coil elements incorporates a marker adapted to produce a magnetic resonance signal.
Claim 13
Dependent Claim
129 words
An RF coil system for use in a magnetic resonance imaging apparatus, said coil system being adapted to perform at least one of application of an excitation high-frequency magnetic field and detection of magnetic resonance signals, comprising: a plurality of coil elements arranged at regularly spaced intervals without any overlap between said coil elements; means for putting each of said coil elements into an operative state or an inoperative state individually; neutralizing means installed between adjacent ones of said coil elements for neutralizing inductive coupling between said coil elements; tuning means for tuning at least one of said coil elements to a given frequency; adder means for adding outputs of said tuning means; and conductors connected to said coil elements, said means, said neutralizing means and said adder means.
Claim 14
Dependent Claim
129 words
An RF coil system for use in a magnetic resonance imaging apparatus, said coil system being adapted to perform at least one of application of an excitation high-frequency magnetic field and detection of magnetic resonance signals, comprising: a plurality of coil elements arranged at regularly spaced intervals without any overlap between said coil elements; means for putting each of said coil elements into an operative state or an inoperative state individually; neutralizing means installed between adjacent ones of said coil elements for neutralizing inductive coupling between said coil elements; tuning means for tuning at least one of said coil elements to a given frequency; adder means for adding outputs of said tuning means; and conductors connected to said coil elements, said means, said neutralizing means and said adder means.
Claim 15
Dependent Claim
24 words
An RF coil system according to claim 11, in which said means, said neutralizing means and said conductors are disposed outside said coil elements.
Claim 16
Dependent Claim
30 words
An RF coil system according to claim 11, in which said coil elements are arranged on a top board of a bed on which a subject under examination is placed.
Claim 17
Dependent Claim
25 words
An RF coil system according to claim 11, in which each of said coil elements incorporates a marker adapted to produce a magnetic resonance signal.
Claim 18
Dependent Claim
46 words
An RF coil system according to claim 11, in which said coil elements are arranged on a top board of a bed on which a subject under examination is placed and each of said coil elements incorporates a marker adapted to produce a magnetic resonance signal.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-09-01 | 1996-03-02 | 1996-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-09-01 | 2000-03-02 | 2000-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-09-01 | 2004-03-02 | 2004-09-01 | $7700.00 | Window Closed / Lapsed |