PROBLEM TO BE SOLVED: To provide an interference detecting device and a medical image diagnostic apparatus for previously detecting a sign of a contact when a clean field such as a subject almost comes into contact with a gantry (an unclean field).SOLUTION: This interference detecting device is provided with: a contact prediction sensor including a light emission section for radiating a plurality of optical beams for previously preventing an object passing through a tunnel-shaped opening section from coming into contact with the opening section wall face, and a light receiving part for receiving the plurality of optical beams from the light emission part, and spreading the optical beams along the wall face of the opening section by a flux of the optical beams irradiated from the light emission section toward the light receiving section and a detecting means, when either of the optical beams irradiated from the light emission section to the light receiving section is interrupted, detecting it.COPYRIGHT: (C)2008,JPO&INPIT【課題】被検体等の清潔野が架台表面(不潔野)に接触しそうになった場合に、接触の兆しを事前に検知する干渉検知装置及び医用画像診断装置を提供する。【解決手段】トンネル状の開口部内を通る物体が開口部壁面に接触するのを未然に防止するため、複数本の光ビームを放射する発光部と、発光部からの複数の光ビームをそれぞれ受光する受光部とを含み、発光部から受光部に向けて放射された光ビームの束によって開口部の壁面に沿って光ビームを張り巡らす接触予知センサと、発光部から前記受光部に放射された光ビームのいずれかが遮断されたときにそれを検知する検知手段とを具備してなる。【選択図】 図2
