Magnetic resonance imaging method utilizing small excitation...

Details Magnetic resonance imaging method utilizing small excitation... Magnetic resonance imaging method utilizing small excitation...

G - Physics

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G01N 24/08 (2006.01) G01R 33/54 (2006.01) G01R 33/56 (2006.01) G01R 33/561 (2006.01)

Patent

CA 1246144

PHN 11.462 11.1.1986 ABSTRACT: Magnetic resonance imaging method utilizing small excitation pulses. In known spin echo imaging experiments a waiting period is customarily observed between two successive spin echo measurements in order to allow for the magnetic moment to relax in the direction of the uniform magnetic field Bo. In addition to this waiting period, the use of 180° pulses also leads to a compara- tively long experimentation time which increases the risk of image artefacts due to motions of, for example a patient to be examined. This comparatively long experi- mentation time is also unfavourable in view of the radiation load. In order to avoid these drawbacks, a method is proposed in which the electromagnetic pulses used are exclusively excitation pulses in the form of .alpha.° pulses, where 0 < .alpha. < 90.

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