PROBLEM TO BE SOLVED: To provide a biological measurement apparatus and an image formation method that can form an image which is as uniform as possible by suppressing differences in spatial resolution and noise characteristic with positions in a region to be measured.SOLUTION: A biological measurement apparatus 10 includes a light irradiation part which irradiates a region B to be measured with light, an optical detection part which detects diffused light from the region to be measured, and an arithmetic part 14 which forms a reconstructed image associated with the interior of the region to be measured. The operation part 14 forms the reconstructed image by calculating J coefficients wj (J is the number of pixels of the reconstructed image) which are set by the pixels of the reconstructed image, and larger than 0 and equal to or less than 1, and performing a sequential approximation operation using an iterative expression (where (k) is an integer of 1 to N, N is the number of times of iterative operation, xj(k) is a pixel value in a (k)th iterative operation of a (j)th pixel, and dj(k) is an update quantity in the (k)th iterative operation of the (j)th pixel).COPYRIGHT: (C)2013,JPO&INPIT【課題】被計測部位内部の位置による空間分解能や雑音特性の差を抑制し、より均一に近い画像を作成することができる生体計測装置および画像作成方法を提供する。【解決手段】生体計測装置10は、被計測部位Bに光を照射する光照射部と、被計測部位からの拡散光を検出する光検出部と、被計測部位の内部に関する再構成画像を作成する演算部14とを備える。演算部14は、再構成画像の各画素毎に設定される、0より大きく且つ1以下であるJ個の係数wj(Jは再構成画像の画素数)を算出し、次の反復式【数1】(但し、kは1からNまでの整数であり、Nは反復演算の回数である。xj(k)は第j番目の画素のk回目の反復演算時における画素値であり、dj(k)は第j番目の画素のk回目の反復演算時における更新量である。)を用いた逐次近似演算を行うことにより再構成画像を作成する。【選択図】図1
