| 摘要 |
PROBLEM TO BE SOLVED: To provide a low-cost and high-speed two-dimensional and three-dimensional MRI apparatus simultaneously reconstructing distribution images of a plurality of nuclides included inside a target subject. SOLUTION: This simplified imaging apparatus has: an MR projection signal acquisition means 1 projecting transmissive beams such as X-rays superposed with RF band waves to the target subject S placed in a uniform static magnetic field not having a gradient magnetic field from a plurality of directions, measuring an excited nuclear magnetic resonance signal by a magnetic sensor, and selecting and generating it in each resonance frequency corresponding to each of the plurality of nuclides; an image reconstruction means 2 previously calculating a reconstruction coefficient value to each the beam transmitted through a partial space of an pixel by use of variable sampling and singular value decomposition, performing product sum calculation of an MR projection signal value and the reconstruction coefficient value to calculate a pixel value of the pixel, and simultaneously reconstructing the distribution images of the plurality of nuclides; a pixel substance estimation means 3 using component information about the included nuclides; and an image display means 4 displaying the two-dimensional or three-dimensional image. COPYRIGHT: (C)2005,JPO&NCIPI
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