| 摘要 |
PROBLEM TO BE SOLVED: To easily change the number of detectors and make the device into lightweight and small size by supporting a detector main body detecting gamma rays given to a subject with the inside of a rotary ring, and enabling the detector main body to be approached to and separated from the subject by a pantograph mechanism. SOLUTION: A fixed ring 12 is fixed on the frame base 11 movably placed on floor rails 10, a rotary ring 13 is rotatably in the circumferential direction fitted to the inside, and a detector 14 is fitted to the inside of the rotary ring 13. An approaching/separating mechanism 25 for approaching and separating the detector main body 21 to/from a subject is fitted to the inside of a detector base 23, and a slide base 24 is turnably fitted to the operating base. In the detector main body 21, semiconductor detecting elements such as CdTe are arranged two-dimensionally, and because a pantogrtaph mechanism is adopted for the approaching/separating mechanism 25, it is small-sized and light- weighted, in addition, space saving of radially moving stroke is made possible.
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