G - Physics – 01 – N
Patent
G - Physics
01
N
324/1
G01N 24/08 (2006.01) G01R 33/567 (2006.01) G01R 33/58 (2006.01)
Patent
CA 1250891
-10- ABSTRACT: "Method and device for determining an NMR distribution in a region of a body." The method and the device for making NMR images in accor- dance with the invention utilize additional measurements and addi- tional calculations in order to achieve a substantial reduction of image artefacts caused by (respiratory) motion of the body. The additional measurements involve the sampling of the non-conditioned FID or spin echo signal which can (but need not) be performed during each measurement cycle without consuming a substantial amount of additional measurement time. The non-conditioned signal samples are used to derive a reference frequency spectrum which is a measure of the size of the object. By comparing this reference with the fre- quency spectra of the various measurement cycles, standardization is obtained so that image signals produce an unambiguous image even though they have been derived from signal samples taken from measure- ment cycles performed in different states of motion (different object size).
496409
Fetherstonhaugh & Co.
Koninklijke Philips Electronics N.v.
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