Electricity: measuring and testing – Particle precession resonance – Spectrometer components
Patent
1986-08-29
1987-10-27
Tokar, Michael J.
Electricity: measuring and testing
Particle precession resonance
Spectrometer components
324309, G01R 3320
Patent
active
047032740
ABSTRACT:
Shaped RF field distributions from separate "surface" coils overlap to define a limited inner-volume deep within a human body or other object under examination. A spin echo MRI signal is effectively elicited only from such limited inner-volume so as to permit conventional MRI signal processing (e.g., utilizing Fourier Transformations) to derive and display magnetic resonance images of desired cross-sections of the limited inner-volume thus avoiding possible motion artifact and/or other potential noise sources located elsewhere in the object. A special receiver coil decoupling circuit is used to automatically increase its resonant frequency during RF transmit times.
REFERENCES:
patent: 4297637 (1981-10-01), Crooks et al.
Arakawa Mitsuaki
Carlson Joseph W.
Fehn John H.
Kaufman Leon
McCarten Barry M.
The Regents of the University of California
Tokar Michael J.
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