PROBLEM TO BE SOLVED: To enable a more quantitative measurement of the amount of oxygen in blood in the oxygen amount measurement in blood where an optoacoustics analysis method is used.SOLUTION: In the oxygen amount measurement in blood where the optoacoustics analysis method is used, the number of molecules m of hemoglobin in blood in a blood vessel is calculated based on the cross-sectional image data V of the blood vessel, an oxygen saturation degree SpO2 of the blood in the blood vessel is calculated based on a signal strength Po (800) of a first photoacoustic wave and a signal strength Po (756) of a second photoacoustic wave, and an oxygen amount VO2 in the blood is calculated based on the number of molecules m and the oxygen saturation degree SpO2.COPYRIGHT: (C)2013,JPO&INPIT【課題】光音響分析法を用いた血液中の酸素量測定において、血液中の酸素量のより定量的な計測を可能とする。【解決手段】光音響分析法を用いた血液中の酸素量測定において、血管の断面画像データVに基づいて、上記血管における血液中のヘモグロビンの分子数mを算出し、第1の光音響波の信号強度Po(800)および第2の光音響波の信号強度Po(756)に基づいて、上記血管における血液についての酸素飽和度SpO2を算出し、上記分子数mおよび上記酸素飽和度SpO2に基づいて血液中の酸素量VO2を算出する。【選択図】図1
