PROBLEM TO BE SOLVED: To provide a photoacoustic blood model which can simulate the oxygen saturation of a human body in photoacoustic wave diagnosis and is suitable for accuracy control and calibration of a photoacoustic wave diagnostic apparatus.SOLUTION: The photoacoustic blood model contains two or more kinds of light absorbing compounds in a blood model base material, in which the absorption coefficient ratios μ[λ2]/μ[λ1] at arbitrary two wavelengths λ1 and λ2(λ1<λ2) of 600 nm or more and 1100 nm or less of the compounds are different from each other and the parameter S calculated from Equation (1) is 0 or more and 100 or less, in which HbO2[λ1] indicates an absorption coefficient of oxyhemoglobin at the wavelength λ1, HbO2[λ2] indicates an absorption coefficient of oxyhemoglobin at the wavelength λ2, Hb[λ1] indicates an absorption coefficient of deoxyhemoglobin at the wavelength λ1, Hb[λ2] indicates an absorption coefficient of deoxyhemoglobin at the wavelength λ2, and P indicates a ratio (Pλ2/Pλ1) of a photoacoustic signal intensity Pλ2 obtained by irradiation with light of the wavelength λ2 to a photoacoustic signal intensity Pλ1 obtained by irradiation with light of the wavelength λ1.COPYRIGHT: (C)2015,JPO&INPIT【課題】光音響波診断において、人体の酸素飽和度を模擬でき、光音響波診断装置の精度管理や校正に好適な光音響用血液モデルを提供することを目的とする。【解決手段】血液モデル母材中に2種以上の光吸収性化合物を含有し、600nm以上1100nm以下の任意の2波長λ1、λ2(λ1<λ2)における光吸収性化合物の吸収係数の比率μ[λ2]/μ[λ1]が互いに異なり、式(1)から算出されるSが0以上100以下である。HbO2[λ1]:波長λ1におけるオキシヘモグロビンの吸収係数HbO2[λ2]:波長λ2におけるオキシヘモグロビンの吸収係数Hb[λ1]:波長λ1におけるデオキシヘモグロビンの吸収係数Hb[λ2]:波長λ2におけるデオキシヘモグロビンの吸収係数P’:波長λ1の光を照射して得られる光音響信号強度Pλ1と波長λ2の光を照射して得られる光音響信号強度Pλ2の比(Pλ2/Pλ1)【選択図】なし
