PROBLEM TO BE SOLVED: To provide a vascular endothelium function examination instrument capable of easily obtaining a consistent quality of examination result while reducing the burden of the subject and the examiner.SOLUTION: The vascular endothelium function examination instrument comprises: an image generation unit for generating blood vessel images indicating the structure of a vascular proximal wall and of a vascular distal wall comprising an intima, a media, and an adventitia, based on reflections detected by an ultrasound probe a boundary identification unit for identifying a lumen-intima boundary, an intima-media boundary, and a media-adventitia boundary in each of the vascular proximal wall and the vascular distal wall, based on the blood vessel images a blood vessel diameter measurement unit for measuring a blood vessel diameter using a plurality of combinations among combinations of boundaries in the vascular proximal wall and in the vascular distal wall an examination unit for examining the vascular endothelial function, based on the blood vessel diameters before and after avascularization and an output control unit for causing the output unit to output the examination result of the examination unit.SELECTED DRAWING: Figure 6COPYRIGHT: (C)2017,JPO&INPIT【課題】被検者及び検査者の負担を軽減しつつ、一定品質の検査結果を容易に得ることができる血管内皮機能検査装置を提供する。【解決手段】血管内皮機能検査装置は、超音波プローブによって検出された反射波に基づいて、内膜、中膜及び外膜からなる血管近位壁及び血管遠位壁の構造を示す血管画像を生成する画像生成部と、血管画像に基づいて、血管近位壁及び前記血管遠位壁のそれぞれにおける、内腔内膜境界、内膜中膜境界及び中膜外膜境界を特定する境界特定部と、血管近位壁における境界と血管遠位壁における境界との組み合わせのうち、複数の組み合わせを用いて血管径を測定する血管径測定部と、駆血前後の血管径に基づいて血管内皮機能を検査する検査部と、検査部による検査結果を出力部に出力させる出力制御部と、を備える。【選択図】図6
