PROBLEM TO BE SOLVED: To bring a matching material bag storing an acoustic matching material into close contact with a living body, in an ultrasonic bone assessment device that makes bone assessment on a living body by transmitting/receiving an ultrasonic wave for the living body.SOLUTION: A bulging section 42 for bulging out toward a living body is provided in the matching material bag 18 that stores the acoustic matching material. The bulging section 42 has a first and second side faces 48, 50 along the bottom face 20 and abutment face 22 of a footrest 14 that are arranged in an L-shape. The first and second side faces are also arranged in the L shape. A portion held between the first and second side faces of the bulging section 42 is a part of a spherical face, and abuts on a leg. The bulging section 42 does not interfere with the footrest even near the corner of the L-shape of the footrest 14, bulges out toward the center of the footrest, and fully closely sticks to the circumference of the leg in this portion.COPYRIGHT: (C)2012,JPO&INPIT【課題】生体に対して超音波を送受して生体内の骨の評価を行う超音波骨評価装置において、音響整合材を収容する整合材袋を生体に密着させる。【解決手段】音響整合材を収容する整合材袋18に生体に向けて膨出する膨出部42を設ける。膨出部42は、足置き台14のL字形に配置された底面20、当接面22に沿う第1および第2の側面48,50を有する。第1および第2の側面もL字形に配置される。膨出部42の第1および第2の側面に挟まれた部分は、球面の一部であり、この部分が足に当接する。膨出部42が足置き台14のL字形の角付近においても、足置き台と干渉せず、足置き台の中央に向けて膨らんでおり、この部分の足の周囲に十分に密着する。【選択図】図3
