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    • 11. 发明专利
    • MAGNETIC RESONANCE IMAGING SYSTEM
    • JP2003225223A
    • 2003-08-12
    • JP2002025910
    • 2002-02-01
    • HITACHI MEDICAL CORP
    • KUMAI HIDEKIKAWASAKI SHINJITAKEUCHI HIROYUKI
    • G01R33/54A61B5/055G01R33/48G01R33/565G01R33/567
    • PROBLEM TO BE SOLVED: To stably provide an image wherein an artifact caused by the body movement of a subject is suppressed in an diffusion-emphasized imaging method. SOLUTION: Navigation echos are obtained as body movement monitors for each data measurement after an RF excitation pulse is applied, and one of them is made a reference navigation echo. Then, a primary phase inclination is calculated from data which are obtained by one-dimensional Fourier transform of the reference navigation echo in the reading direction. Also, a primary phase inclination is calculated by data which are obtained by one-dimensional Fourier transform of respective navigation echos in the reading direction. Then, whether a difference between the primary phase inclination by the reference navigation echo and the primary phase inclination by respective navigation echos is within an allowable value or not is judged. Regarding the main measurement echo signal corresponding to the navigation echo which is at the allowable value or higher, it is judged that the correction of the main measurement echo signal by a navigation body movement correcting method becomes improper, and the navigation echos and the main measurement echo signal are measured again. Thus, the image wherein the body movement artifact is suppressed can be stably obtained. COPYRIGHT: (C)2003,JPO