| 摘要 |
PURPOSE: To save time and labor for regulation of the sensitivity of a large number of sensors and to increase the accuracy in the regulation in a position CT equipment having a large number of two-dimensional radiation position detectors arranged in the shape of a ring. CONSTITUTION: CPU 53 reads out data collected in regard to a reference radiation source from a memory 52. Regulation of the sensitivity among two-dimensional radiation position detectors 10 is conducted by controlling variable gain amplifiers 41-44 for one detector 10 in common. Regulation of the sensitivity among photosensors 11, 21, 12 and 22 in each detector 10 is conducted by controlling the variable gain amplifiers 41-44 for each detector 10 discretely.
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