G - Physics – 01 – N
Patent
G - Physics
01
N
324/1
G01N 24/08 (2006.01) A61B 5/05 (2006.01) A61B 5/055 (2006.01) G01R 33/50 (2006.01)
Patent
CA 1187552
Abstract For recording the nuclear magnetic resonance in selected areas of a body for the purpose of representing body cross-sections in the form of images (NMR tomography), wherein the nuclear spins of a selected type present in the area of one plane of the body are subjected to a super- imposed gradient field varying in the selected cross- sectional plane, and selectively excited, the excitation of the nuclear spins is effected by application or a pulse sequence which induces the nuclear spins to supply at one stage a number of chronologically successive induction signals. The induction signals corresponding to each other in chronolical sequence are then processed to obtain separate sets of image signals so that by one single measurement a sequence of cross-sectional images is obtained which differ from each other by the intensity of the excited nuclear spins which varies according to the relaxation times T1 or T2. The fact that all images have been obtained by one and the same measurement provides the possibility to determine the relaxation times T1 and/or T2 related to the individual image points and to use them on the one hand for purposes of selective image representation and, on the other hand, for improving the image quality.
423889
Brunner Peter
Knuttel Bertold
Post Hans
Ratzel Dieter
Bruker Medizintechnik Gmbh
Gowling Lafleur Henderson Llp
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