| 摘要 |
A magnetic resonance imaging apparatus generates tomograms according to the echo planar imaging method (EPI), with at least one of the gradient coils having a resonant circuit allocated thereto which is excited by an amplifier. A capacitor forms a series resonant circuit with the gradient coil, and a controlled gain amplifier which is operated as a current regulator, such as a switched current regulator, is connected to this series resonant circuit. The read-out gradient Gx is switched on at a time t0, the gradient Gx having a transient region tau 1 beginning at t0 and ending at a time t2. The gradient current I(t) is steady in this transient region tau 1, and the integral of the gradient current I(t) over t0 through t2 is zero.
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