Method and device for determining an nmr distribution in a...

Details Method and device for determining an nmr distribution in a... Method and device for determining an nmr distribution in a...

G - Physics

01

N

324/1, 326/12

G01N 24/08 (2006.01) G01R 33/48 (2006.01) G01R 33/54 (2006.01)

Patent

CA 1253917

ABSTRACT Method and device for determining an NMR distribution in a region of a body. The method and device for NMR Fourier zeugmatography utilizes amplitude-modulated r.f. pulses (90° and 180° pulses) for the excitation of nuclear spins and the generating of nuclear spin echo signals. For three-dimensional Fourier zeugmatography r.f. pulse having a large bandwidth (for example 10 - 50 kHz) are desired. The use of amplitude-modulated signals then implies an undesirably high peak power of the r.f. generator. In accordance with the invention, use is made of a frequency-modulated signal which can have a substantially constant amplitude and which preferably covers the desired frequency spectrum at a uniform speed.

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