MAGNETIC RESONANCE IMAGING APPARATUS

PROBLEM TO BE SOLVED: To achieve parallel imaging without extending measurement time in photographing utilizing a short TR sequence, to perform appropriate foldover removal and to provide the MR images of high quality. SOLUTION: At the time of executing the pulse sequence of continuously impressing high frequency exciting pulses (RF exciting pulses) in short repetition time, this apparatus measures nuclear magnetic resonance signals for sensitivity distribution before a time 402 at which a spin reaches SSFP and performs main measurement 403 thereafter. Further, a signal processing for foldover removal is executed to data for image reconstitution (main measurement data) by using data for the sensitivity distribution obtained in a series of pulse sequences. Thus, since the main measurement data are measured with time sufficient for signals to reach a normal state, excellent images are obtained. Also, since the sensitivity distribution is measured by utilizing the time before the main measurement, the practical measurement time is not extended. COPYRIGHT: (C)2005,JPO&NCIPI