MAGNETIC RESONANCE IMAGING DEVICE, PHASE VALUE CORRECTION METHOD AND PROGRAM

摘要

The purpose of the present invention is to, when spectral distortion caused by an eddy current in an MRI device is corrected, suppress artifacts caused by the correction by a simple method and improve the accuracy of the correction. In eddy current correction processing for correcting spectral distortion caused by an eddy current using the phase value of an FID signal from a substance having higher signal intensity than a metabolic substance to be measured, a phase jump of the phase value to be used for the correction is corrected in advance. In the correction of the phase jump, areas having a small phase change amount are specified using a first time derivative value of the phase value, and the other areas are specified as phase jump occurrence areas. The specified phase jump occurrence areas are removed from the first time derivative value. The phase jump occurrence area is specified, using the first time derivative value, as an area where the first time derivative value changes by a predetermined threshold value or more in a predetermined range.