X-RAY COMPUTER TOMOGRAPHIC APPARATUS

PROBLEM TO BE SOLVED: To provide an X-ray computer tomographic apparatus capable of securing safety of a subject in sitting and standing radiography.SOLUTION: In an X-ray CT apparatus according to the embodiment, a cradle body has an X-ray source and an X-ray detector arranged with an opening in between. A cradle support part supports the cradle body in the state that a central axis of the opening faces almost vertically with respect to a floor surface in the way that it can move in a vertical direction to the floor surface. A protective cover is provided for the floor surface in the way that it is housed within a first area near a boundary between the first area the opening of the cradle body passes when the cradle body moves and a second area showing an outside of the first area. With a prescribed movement of the protective cover as a trigger, a control part switches a movable range of the cradle body in the vertical direction between a first movable range where the cradle body can lower to a first lower limit position and a second movable range where the cradle body can lower to the second lower limit position lower than the first lower limit position.SELECTED DRAWING: Figure 1 【課題】座位および立位撮影における被検体の安全を確保することができるＸ線コンピュータ断層撮影装置を提供する。【解決手段】実施形態に係るＸ線ＣＴ装置において、架台本体は、開口を挟んで配置されたＸ線源とＸ線検出器とを有する。架台支持部は、開口の中心軸が床面に対して略垂直を向いた状態の架台本体を、床面に対して垂直方向に移動可能に支持する。保護カバーは、床面に設けられ、架台本体が移動する場合に架台本体の開口が通過する第１領域と第１領域の外側を示す第２領域との境界近傍に前記第１領域内に収まるように設けられる。制御部は、保護カバーの所定の動作を契機として、架台本体の垂直方向への移動可能範囲を、架台本体を第１下限位置まで下降可能とする第１移動可能範囲と、架台本体を第１下限位置より低い第２下限位置まで下降可能とする第２移動可能範囲との間で切り替える。【選択図】 図１