PROBLEM TO BE SOLVED: To provide a biological measurement apparatus for measuring a location at which a light adsorber such as a tumor exists in the entire to-be-measured region.SOLUTION: The biological measurement apparatus 10 includes: a vessel 12 for holding an optical interface material 20 a light irradiation means for irradiating the to-be-measured region immersed in the optical interface material 20 with first and second lights having different wavelengths a light detection means for detecting a diffusion light from the to-be-measured region and a calculation/control section 14 for calculating internal information from an output signal of the light detection means. The wavelength &lambda1 of the first light is a wavelength at which an absorption coefficient of the to-be-measured region is substantially equal to an absorption coefficient of a medium. The wavelength &lambda2 of the second light is a wavelength at which the absorption coefficient of the to-be-measured region is larger than the absorption coefficient of the medium. The calculation/control section 14 calculates the internal information from the output signal related to the diffusion light of the first light, and calculates a boundary between the to-be-measured region and the optical interface material 20 from the output signal related to the diffusion light of the second light.COPYRIGHT: (C)2009,JPO&INPIT【課題】被計測部位の全体に対する腫瘍などの光吸収体の存在位置を計測できる生体計測装置を提供する。【解決手段】生体計測装置10は、光学的インターフェース材20を保持する容器12と、互いに波長が異なる第1及び第2の光を光学的インターフェース材20に浸される被計測部位へ照射する光照射手段と、被計測部位からの拡散光を検出する光検出手段と、光検出手段からの出力信号に基づいて内部情報を算出する演算/制御部14とを備え、第1の光の波長λ1が、被計測部位の吸収係数と媒体の吸収係数とが実質的に等しい波長であり、第2の光の波長λ2が、被計測部位の吸収係数が媒体の吸収係数より大きい波長であり、演算/制御部14は、第1の光の拡散光に関する出力信号に基づいて内部情報を算出し、第2の光の拡散光に関する出力信号に基づいて被計測部位と光学的インターフェース材20との境界を算出する。【選択図】図1
