| 摘要 |
PROBLEM TO BE SOLVED: To provide stable images free of linear artifacts and image distortion through EPI imaging. SOLUTION: Phase changes between pre-measurement echo signals which are adjacent to each other in time are calculated by use of a pre-measurement echo signal which is measured, separately from a main measurement echo signal for image capturing, within each period of a readout gradient magnetic field which is reversed without application of a phase encoding inclined pulse, and a map of phase differences is originated by use of each phase change (107, 108). In this case, elimination of and averaging of the phase differences, etc., are effected to enhance the accuracy of the phase differences (109, 110). The lag of sampling times when the main measurement echo signal is obtained by use of the map of the phase differences is calculated (112). The sampling times of a main measurement sequence are adjusted so that the lags match among odd-numbered echoes and even-numbered echoes in EPI (114).
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