| 摘要 |
A prescan process for a MR fast spin echo (FSE) pulse sequence (FIG. 2 ) adjusts the phases of the RF excitation pulse and RF refocusing pulses and the value of the readout gradient dephaser pulse to reduce zero order phase shifts along all axes and first order phase shifts along the slice select and readout gradient axes due to eddy currents. Another aspect of the invention is the calculation during the prescan of adjustments to receiver phase and adjustments to readout gradients which further reduce image artifacts due to phase errors produced during the FSE scan.
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