| 摘要 |
PROBLEM TO BE SOLVED: To cope with a diversified data collection mode flexibly by providing three semiconductor detectors rotatably around a subject and combining them properly. SOLUTION: First and second semiconductor detectors 2 and 3 are mounted on a first stand 1, a third semiconductor detector 7 is mounted on a second stand 8, and stand running mechanisms 6 and 10 are run in parallel with the long axis of each bed 14. The semiconductor detectors 2, 3, and 7 rotate respectively around a subject and gamma rays from dosed isotope are converted to an electrical signal. By combining the semiconductor detectors 2, 3 and 7 in various ways, it is made possible to cope with various data collection modes such as a static data collection mode, a SPECT data collection mode, a 2- detector opposition SPECT data collection mode, a 2-detector 90 deg. opposition SPECT data collection mode, and 3-detector SPECT data collection mode. Also, the semiconductor detector 3 can be made freely detachable and also can be upgraded later.
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