Electricity: measuring and testing – Particle precession resonance – Using a nuclear resonance spectrometer system
Patent
1990-11-21
1993-01-19
Tokar, Michael J.
Electricity: measuring and testing
Particle precession resonance
Using a nuclear resonance spectrometer system
G01R 3320
Patent
active
051809818
ABSTRACT:
A method for removing unwanted signal components acquired by applying a three dimensional magnetic resonance imaging pulse sequence to a sample, wherein signal acquisition is desired from a selected planar slice, but unwanted signal components are also acquired from a plurality of planar slices located outside the boundaries of the selected slice. According to the method, both a radio frequency saturation pre-pulse and a linear field gradient are applied to the sample. The pre-pulse and field gradient create a comb-like pattern of planar nuclear magnetic saturation regions in the sample, each of the regions being spatially positioned between a respective pair of contiguous planer slices. Next, a 3-D imaging sequence is applied to the sample. The timing of the 3-D imaging sequence is such that the comb-like saturation pattern of the pre-pulse sequence is imposed upon the 3-D imaging sequence so as to reduce the acquisition of signal originating from the regions when acquiring signal from the selected slice.
REFERENCES:
patent: 4740748 (1988-04-01), Rzedzian
patent: 4818942 (1989-04-01), Rzedzian
patent: 4940941 (1990-07-01), Rzedzian
Edelman Lawrence C.
Siemens Medical Systems Inc.
Tokar Michael J.
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