PROBLEM TO BE SOLVED: To provide an X-ray CT apparatus efficiently reducing X-ray shielding due to a detector: and to provide a control method.SOLUTION: An X-ray CT apparatus includes a radiation source, a plurality of detectors and a processing circuit. The radiation source radiates X-rays while rotating around a prescribed track. The plurality of detectors are designated on an annular ring and detect the radiated X-rays. The processing circuit moves a subset of the detectors close to the radiation source, in a direction where the processing circuit intersects with the surface of the prescribed track of the radiation source in accordance with the position of the radiation source.SELECTED DRAWING: Figure 4COPYRIGHT: (C)2016,JPO&INPIT【課題】検出器によるX線の遮蔽を効率よく低減することができるX線CT装置及び制御方法を提供すること。【解決手段】実施形態のX線CT装置は、放射線源と、複数の検出器と、処理回路とを備える。放射線源は、所定軌道で回転しながらX線を放射する。複数の検出器は、環状リングに配置され、放射X線を検出する。処理回路は、放射線源の位置に従って放射線源の所定軌道の面に交わる方向に、放射線源に近接した検出器の部分集合を移動させる。【選択図】図4
