PROBLEM TO BE SOLVED: To provide an X-ray CT apparatus effectively reducing collected noise from a noise source so that an operator can clearly discriminate patients voice passing through a microphone.SOLUTION: A medical image diagnostic apparatus is provided with: a scanner device 21 and a sound collection device 42 including a sound collection part M collecting voice and a diffraction board D disposed along the outer periphery of the sound collection part M and capable of advancing/retreating in an advancing/retreating direction. The diffraction board D has a structure where a position in the advancing/retreating direction is variable in accordance with a positional relation between the sound collection device 42 and the noise sources of the scanner device 21.SELECTED DRAWING: Figure 3COPYRIGHT: (C)2017,JPO&INPIT【課題】X線CT装置において、収集される騒音源からの騒音を効果的に低減することで、操作者が、マイクロホンを通した患者の音声を明瞭に識別できるようにすること。【解決手段】医用画像診断装置は、スキャナ装置21と、音声を収集する集音部M、及び、集音部Mの外周に沿って設けられ進退方向に進退可能な回折板Dを備えた集音装置42と、を設ける。回折板Dは、集音装置42とスキャナ装置21の騒音源との位置関係に応じて進退方向の位置が可変の構成を有する。【選択図】 図3
