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US4737714A Expired / Lapsed US ⏱️ 0.0 years remaining

Magnetic resonance spectroscopy

Assignee: Toshiba Corp
•
Filing: 1987-06-22
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Granted: 1988-04-12
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Expires: 2007-06-22
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Abstract

Abstract A magnetic resonance spectroscopic system for receiving a magnetic resonance signal from a localized area in a certain slice in a sample and obtaining a frequency spectrum of the magnetic resonance signal based on the received signal, includes control means for selectively exciting regions sandwiching a zone containing said localized area in one of x- and y-axis directions in said slice, thereafter applying a spoiler to eliminate lateral spin components from said regions, selectively exciting regions sandwiching a zone containing said localized area in the other of x- and y-axis directions in said slice, thereafter applying a spoiler to eliminate lateral spin components from said last-mentioned regions, and then exciting a zone containing said localized area in a z y -axis direction to extract a magnetic resonance signal of said localized area. The magnetic resonance spectroscopic system is of a simple arrangement capable of facilitating measurements and producing a magnetic resonance signal of a localized area located at a desired depth in the sample under examination.

Inventors

  • 👤 Masatoshi Hanawa

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-04 18:27
CPC Classifications
G; G01; G01R; G01R33/00; G01R33/20; G01R33/44; G01R33/48; G01R33/483; G01R33/4838

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 134 words
A magnetic resonance spectroscopic system for receiving a magnetic resonance signal from a localized area in a certain slice in a sample and obtaining a frequency spectrum of the magnetic resonance signal based on the received signal, said system comprising control means for selectively exciting regions sandwiching a zone containing said localized area in one of x- and y-axis directions in said slice, thereafter applying a spoiler to eliminate lateral spin components from said regions, selectively exciting regions sandwiching a zone containing said localized area in the other of x- and y-axis directions in said slice, thereafter applying a spoiler to eliminate lateral spin components from said last-mentioned regions, and then exciting a zone containing said localized area in a z y -axis direction to extract a magnetic resonance signal of said localized area.
Claim 2
Dependent Claim 134 words
A magnetic resonance spectroscopic system for receiving a magnetic resonance signal from a localized area in a certain slice in a sample and obtaining a frequency spectrum of the magnetic resonance signal based on the received signal, said system comprising control means for selectively exciting regions sandwiching a zone containing said localized area in one of x- and y-axis directions in said slice, thereafter applying a spoiler to eliminate lateral spin components from said regions, selectively exciting regions sandwiching a zone containing said localized area in the other of x- and y-axis directions in said slice, thereafter applying a spoiler to eliminate lateral spin components from said last-mentioned regions, and then exciting a zone containing said localized area in a z y -axis direction to extract a magnetic resonance signal of said localized area.
Claim 3
Dependent Claim 18 words
A magnetic resonance spectroscopic system according to claim 1, wherein said regions are selectively excited by 90° pulses.
Claim 4
Dependent Claim 26 words
A magnetic resonance spectroscopic system according to claim 1, wherein said regions are selectively excited in the y-, x-, and y-axis directions in the named order.
Claim 5
Dependent Claim 27 words
A magnetic resonance spectroscopic system according to claim 1, wherein said zone is excited in the z y -axis direction by +Gz pulses and thereafter -Gz pulses.
Claim 6
Dependent Claim 33 words
A magnetic resonance spectroscopic system according to claim 1, wherein said regions are selectively excited while a plurality of different frequency signals sandwiching the zones containing the localized area are serving as carriers.

References Cited (Backward Citations)

US4319190A Cited
US4480228A Cited
US4694250A Cited
US4689563A Cited
US4689564A Cited
US4698592A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1991-04-12 1991-10-12 1992-04-12 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1995-04-12 1995-10-12 1996-04-12 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1999-04-12 1999-10-12 2000-04-12 $7700.00 Window Closed / Lapsed

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