PROBLEM TO BE SOLVED: To prevent the wind noise being generated according to the rotation of a rotating section, and to reduce the leakage to the outside of the rotating section of the noise generating from a rotation side device in the rotating section.SOLUTION: A trestle 2 of an X-ray CT apparatus includes: an X-ray tube 9 irradiating an X ray to a subject P an X-ray detector 10 detecting an X ray penetrating the subject P and outputting a detection signal and a cavity 3 in which the subject P is inserted in the center section, and further includes a drum shape rotating section 4 supporting the X-ray detector 10 and the X-ray tube 9 at the opposing position sandwiching the subject P inserted in the cavity 3, and capable of rotating around the subject P a fixing part 5 rotatably supporting the rotating section 4 and a side plate 16 disposed at the rotating section 4 and covering the side portion of the rotating section 4 being orthogonal with the rotation center of the rotating section 4 opening at least the cavity 3.COPYRIGHT: (C)2013,JPO&INPIT【課題】回転部の回転に伴う風切音の発生を防止し、及び、回転部内の回転側機器から発生した騒音の回転部外への漏れ出しを低減させる。【解決手段】X線CT装置の架台2は、被検体PにX線を照射するX線管9と、被検体Pを透過したX線を検出して検出信号を出力するX線検出器10と、中央部に被検体Pが挿入される空洞部3を有し、この空洞部3に挿入された被検体Pを挟んで対向する位置にX線管9とX線検出器10とを支持し、被検体Pの回りに回転可能なドラム状の回転部4と、回転部4を回転可能に支持する固定部5と、回転部4に取付けられてこの回転部4の回転中心と直交する回転部4の側方部を少なくとも空洞部3を開放して覆う側板16と、を備える。【選択図】図1
