PROBLEM TO BE SOLVED: To provide a technique for suppressing inflowing system noise in a measuring apparatus when switching a probe in receiving a photoacoustic wave and an ultrasound wave.SOLUTION: A measuring apparatus to be used comprises: a first probe that includes a first acoustic conversion element 1 for transmitting an ultrasound wave, receiving the ultrasound wave reflected by a subject and converting the received ultrasound wave into an electric signal a second probe that includes a second acoustic conversion element for receiving a photoacoustic wave generated when the subject absorbs light emitted from a light emission part, and converting the received photoacoustic wave into an electric signal a receiving part that receives the electric signals converted by the first and second acoustic conversion elements and converts the received signals into digital signals and switching means switching the acoustic conversion elements so that the receiving part receives either one of the electric signals.COPYRIGHT: (C)2015,JPO&INPIT【課題】測定装置において、光音響波と超音波の受信でプローブを切替える場合に、システムノイズ流入を抑制するための技術を提供する。【解決手段】超音波を送信し、被検体で反射した超音波を受信して電気信号に変換する第1の音響変換素子を含む第1のプローブと、光照射部から照射された光が被検体に吸収されて発生する光音響波を受信して電気信号に変換する第2の音響変換素子を含む第2のプローブと、第1および第2の音響変換素子で変換された電気信号を受信してデジタル信号に変換する受信部と、受信部が電気信号を受信する音響変換素子を切替える切替え手段とを有する測定装置を用いる。【選択図】図1
