PROBLEM TO BE SOLVED: To provide a technique for suppressing inflowing system noise in a measuring apparatus when a probe is switched to receive a photoacoustic wave and an ultrasound wave.SOLUTION: The measuring instrument includes: a first probe including a first acoustic conversion element that transmits an ultrasound wave, receives the ultrasound wave after the ultrasound wave is reflected by an object, and converts the ultrasound wave into an electric signal a second probe including a second acoustic conversion element that receives a photoacoustic wave generated when light emitted from a light emitter is absorbed by the object and converts the photoacoustic wave into an electric signal a receiver that receives the electric signals converted by the first and second acoustic conversion elements and converts the electric signals into digital signals and a switching unit that switches the acoustic conversion element from which the receiver receives the electric signal.COPYRIGHT: (C)2012,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
