Patent ID: 6777934
Filing Date: 2004-08-17
Classification: G01R

Abstract:
A magnetic resonance imaging method of imaging an object to be examined at high speed using a magnetic resonance phenomenon, comprising the steps of:(a) applying an RF pulse, a slice encoded gradient magnetic field, a phase encoded gradient magnetic field, and a readout gradient magnetic field to the object to be examined, which has been placed in a uniform static magnetic field, in accordance with a predetermined pulse sequence, and executing this pulse sequence repeatedly; (b) detecting NMR signals generated from the object to be examined by executing said detecting step at each of a plurality of small type RF coils which form a multiple coil, and memorizing the resulting NMR signals in a memory corresponding to a k space for each RF coil separately; and (c) performing image composing processing using a sensitivity distribution of an RF coil and measured data memorized in said memory, wherein in a step (a) a step change of an application amount of said phase encoded gradient magnetic field in measuring a low spatial frequency region of the k space is made to be smaller than a step change in measuring a high spatial frequency region therein, in said pulse sequence executed repeatedly, between step (b) and step (c) there is further step (d) performing a process of calculation of a sensitivity distribution of each RF coil using data of the low spatial frequency region of the k space, and in step (c) using the sensitivity distribution of an RF coil calculated in step (d).