| 摘要 |
PROBLEM TO BE SOLVED: To provide an MRI apparatus with a function of easily, quickly and accurately detecting a position of a diaphragm acting as a reference part of viewpoint of a subject used for correcting the respiration motion artifact error by the calculation with navigation pulses. SOLUTION: The MRI apparatus for imaging the subject obtains (m) (m is an integer at least 1 and not more than N) number of navigation echoes without adding phase encoding on a slice surface independent of the slice surface for the main scanning for covering the region of interest 210 including the part of viewpoint for monitoring the respiration motion by each scanned data in obtaining the echo (main scan data) in the number N (N is an integer at least 1) necessary for restructuring an image, Fourier-transforms the obtained navigation echoes first-dimensionally in the direction of frequency, collects data on the real space expressed as the intensity of pixel signals, and extracts the region of interest including the part of viewpoint from the data on the real space by calculation, and as a result, the position of the part of viewpoint is detected from the data on the real space within the region of interest. COPYRIGHT: (C)2004,JPO
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