| 摘要 |
PURPOSE:To obtain an excellent image, by two-dimensionally shifting data relating to a radiation incident position, successively obtained after a predetermined time is finished, corresponding to the estimated variation quantity of a center-of-gravity position. CONSTITUTION:Each time gamma-rays are incident, position signals X, Y showing the positions of gamma-rays and an unblank signal showing incident timing are generated with respect to an examinee 1 from a scintillation camera 2. Said signals X, Y are sent to an image collection memory 5 along with the unblank signal through a shift circuit 3 and an interface circuit 4 to be stored therein. Then, the center-of-gravity positions of a large number of images obtained in the memory 5 are calculated by CPU7 and deviations DELTAX, DELTAY are calculated from the average value of the center-of-gravity positions. After the measurement for calculating the time function of the deviations DELTAX, DELTAY is finished, the image is shifted with respect to the signals X, Y from the detector 2 in the circuit 3 and, at this time, moving quantity at each point of time is estimated and the image is shifted on the basis of the estimated moving quantity so that the center-of-gravity of the image always coincides.
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