MAGNETIC RESONANCE IMAGING DEVICE

摘要

It is possible to effectively control biological movement artifact with a small number of navigator echo acquisitions. A biological movement artifact suppression image is created by distinguishing the exhalation period from the inhalation period of a sample person (101). From at least two navigator echoes (207, 208) measured at a time interval, a displacement and a displacement direction of the sample person (101) at the navigator echo acquisition time are obtained. The timing to acquire the main measurement echo is decided from the displacement and the displacement direction. The displacement direction can be calculated from the primary differentiation of the displacement. Moreover, by obtaining a biological movement prediction function approximating the biological movement cycle before a measurement, it is possible to judge the displacement and the displacement direction by fitting and estimate the main measurement echo acquisition time and interval.