| 摘要 |
PCT No. PCT/FR89/00122 Sec. 371 Date Sep. 17, 1990 Sec. 102(e) Date Sep. 17, 1990 PCT Filed Mar. 20, 1989 PCT Pub. No. WO89/08852 PCT Pub. Date Sep. 21, 1989.A measurement is made of the effects of eddy currents during a long period (TM) in an NMR machine by placing, in this machine, a probe possessing a material capable of magnetic resonance with a small spin-spin relaxation time, and by proceeding to make a reiteration (PR) of the electromagnetic excitation (17-19) of a resonance signal in this material and to measure the resultant de-excitation NMR signal (20-22), for as many times more as the period during which the effects of the eddy currents have to be taken into account is long. It is shown that this way of doing things enables an accurate appreciation of the corrections to be made to the real field gradient pulses (23-24).
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