PROBLEM TO BE SOLVED: To provide an X-ray imaging apparatus which prevents collision of a subject and an X-ray detecting section during imaging even when the apparatus is miniaturized or even when an abnormality is generated in control of a rotation axis.SOLUTION: The X-ray imaging apparatus includes a rotation arm 4 having an X-ray irradiation section 3 and X-ray detection section 2 opposing with each other and an arm driving section 5 hanging the rotation arm 4. The X-ray imaging apparatus carries out imaging by rotating the X-ray irradiation section 3 and the X-ray detection section 2 around a subject O. The arm driving section 5 includes a rotary driving mechanism 14 moving horizontally, a cover 12 arranged around the rotary driving mechanism, and the rotation axis 15 that passes through an opening 16 formed in a part of the cover 12 to connect the rotary driving mechanism 14 with the rotation arm 4 and transmits the horizontal movement of the rotary driving mechanism 14 to the rotation arm 4. The shape of the opening 16 is determined on the basis of a horizontal moving range of the rotation axis 15 necessary for imaging and movement of the rotation axis 15 exceeding the moving range is restricted.COPYRIGHT: (C)2009,JPO&INPIT【課題】装置全体の小型化を図った場合や、旋回軸の制御に異常が発生した場合においても、撮像中に被検体とX線検出部の衝突を防ぐことができるX線撮像装置を提供する。【解決手段】X線撮像装置は、X線照射部3及びX線検出部2を対向して有する旋回アーム4と、旋回アーム4を吊下げるアーム駆動部5とを備え、X線照射部3及びX線検出部2を被検体Oの周りで旋回させて撮像を行う。アーム駆動部5は、水平移動する旋回駆動機構14と、その周りに配置されたカバー12と、カバー12の一部に形成された開口部16を通って旋回駆動機構14と旋回アーム4とを接続し、旋回駆動機構14の水平方向の移動を旋回アーム4に伝達する旋回軸15とを備える。開口部16の形状は撮像に必要な旋回軸15の水平方向の移動範囲に基づいて決定され、前記移動範囲を超える旋回軸15の移動が制限される。【選択図】図2
