| 摘要 |
PROBLEM TO BE SOLVED: To provide MRI equipment capable of providing a dynamic EPI (Echo Planar Imaging) image with a favorable image quality by eliminating image distortion and its fluctuation, image displacement and its fluctuation, and artifact caused by the vibration of a cryocooler when performing the dynamic EPI. SOLUTION: This MRI equipment previously measures three-dimensional fluctuation data indicating a period of a static magnetic field fluctuation, the amount of fluctuation, and positional dependence of the amount of fluctuation and stores them in a storage means in a computer corresponding to the vibration phase of the cryocooler. This equipment corrects the displacement for every pixel of the image using the three-dimensional fluctuation data. COPYRIGHT: (C)2006,JPO&NCIPI
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