| 摘要 |
PROBLEM TO BE SOLVED: To provide a radiation detector and an X-ray CT apparatus that can make inner temperature more uniform with a relatively simple structure. SOLUTION: The X-ray CT apparatus is equipped with a rotary base 11, an X-ray tube 13 mounted thereon, a radiation detector 15 mounted thereon so as to face the X-ray tube 13 and sandwiching the region to be photographed between the two, and a processor that produces an image based on output of the radiation detector 15. The radiation detector 15 is equipped with a detector panel 25 arraying detecting devices to detect radiation incident from a radiation incidence window 16, an accommodating case 17 that accommodates the detecting panel 25 while mounted on the rotary base 11, and a fluid circulation path 39 formed with the detecting panel 25 and the accommodating case 17.
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