PROBLEM TO BE SOLVED: To achieve the precise measurement of bloodstream in a biomedical tissue.SOLUTION: The bloodstream measuring apparatus 10 for biomedical tissues comprises an optical probe 20, an XYZ moving mechanism 12 for moving the optical probe 20, an optical probe circuit 28 for operating the optical probe 20, a measuring part 30 which is connected to the optical probe circuit 28 and measures the bloodstream of biomedical tissues, and a control part 50. The measuring part 30 is connected in series to the optical probe 20 together with an amplifier and comprises a potential shift circuit which changes frequency to compensate a phase difference to zero when the phase difference is caused between the input waveform into the optical probe circuit 28 and the output waveform from it. Relationship between the variation of the frequency and the bloodstream of a biomedical tissue when the phase difference is compensated to zero is previously determined and the bloodstream in the biomedical tissue is calculated from the variation of the frequency that compensates the phase difference to zero as caused when a biomedical tissue as a specimen 8 is irradiated with light. The bloodstream is displayed.COPYRIGHT: (C)2008,JPO&INPIT【課題】生体組織における血流量を精度よく測定することである。【解決手段】生体組織血流量測定装置10は、光探触子20と、光探触子20を移動させるためのXYZ移動機構12と、光探触子20を作動させる光探触子回路28と、光探触子回路28に接続され、生体組織の血流量を測定する測定部30と、制御部50とを含んで構成される。測定部30は、光探触子20に増幅器とともに直列に接続され、光探触子回路28への入力波形と光探触子回路28からの出力波形に位相差が生じるときは、周波数を変化させてその位相差をゼロに補償する位相シフト回路を含み、位相差をゼロに補償したときの周波数変化量と生体組織の血流量との関係を予め求めておき、測定対象物8である生体組織に光を照射したときに生じる位相差をゼロに補償する周波数変化量から生体組織における血流量を算出し、これを表示する。【選択図】図1
