G - Physics – 01 – N
Patent
G - Physics
01
N
324/1
G01N 24/08 (2006.01) G01R 33/20 (2006.01) G01R 33/54 (2006.01)
Patent
CA 1108233
ABSTRACT METHODS OF INDICATING NUCLEAR SPIN DENSITY DISTRIBUTION Spin density distribution in a sample subjected to a static magnetic field along a y-axis is determined by subjecting the sample to an initial magnetic field gradient Gz to the static field together with a 90° selective rf pulse to select a strip. The Gz gradient is then replaced by a filter gradient Gx for a limited period of time during which the free induction signal only partially decays and then immediately replacing the filter gradient by a read gradient Gy and then reading out the free induction decay signal. The sequence may be repeated cyclically with a delay between each cycle.
347147
Fetherstonhaugh & Co.
National Research Development Corporation
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