PROBLEM TO BE SOLVED: To lower visibility of the inside of a gantry enclosure, while retaining the visibility of visible light exited from a projector.SOLUTION: The X-ray computed tomography apparatus according to one embodiment includes a gantry device for performing X-ray CT imaging, and a processing unit for controlling the gantry device. The gantry device includes: a gantry enclosure having an opening through which a subject is inserted and equipped with an imaging mechanism of the X-ray CT imaging at least one projector provided in the gantry enclosure and exiting visible light and a permeable membrane mounted on an inner wall part facing the opening out of the gantry enclosure and transmitting the visible light exited from the projector. The permeable membrane has such a color as to belong to a wavelength band transmitting the visible light, and preventing the inside of the gantry enclosure from being easily viewed from the outside, the wavelength band excluding a wavelength to which the visible light belongs.SELECTED DRAWING: Figure 1【課題】投光器から発せられた可視光線の視認性を保ちつつ架台筐体内への視認性を低下させる事。【解決手段】実施形態に係るX線コンピュータ断層撮影装置は、X線CT撮影を行う架台装置と、架台装置を制御する処理装置と、を有する。架台装置は、被検体が挿入される開口を有し、X線CT撮影の撮影機構を装備する架台筐体と、架台筐体内に設けられ、可視光線を発する少なくとも一つの投光器と、架台筐体のうちの開口に面する内壁部に取り付けられ、投光器から発せられた可視光線を透過する透過膜と、を有する。透過膜は、可視光線を透過し且つ架台筐体の内部を外部から視認しにくい波長帯域であって、可視光線の色が属する波長を除いた波長帯域に属する色を有する。【選択図】 図1
