MAGNETIC RESONANCE IMAGING APPARATUS

摘要

PROBLEM TO BE SOLVED: To constitute an image of a high S/N ratio free from an N/2 artifact and a chemical shift artifact without requiring a complicated process such as legistlation or the like based on the measurement of static magnetic field distribution in ultrahigh speed MRI, to enable imaging and blood flow imaging among artifacts even when there is a moving object such as a blood flow or the like in an image pickup region and to enable imaging not generating neurostimulation even if an intensive fast gradient magnetic field is used. SOLUTION: The spin in a subject is excited by a high frequency magnetic field applied at every predetermined repeated time and a read gradient magnetic field 51 is reversed a plurality of times within the predetermined repeated time and a phase encoded gradient magnetic field 52 is applied once at each time when the read gradient magnetic field 51 is reversed twice. Therefore, imaging can be performed without generating neurostimulation.