Even if the physical properties such as density to be measured inside are distributed unevenly, and capable of achieving distribution of the physical properties of the measurement area no loss of image quality due to phenomena such as multiple reflections and refraction caused by non-uniformity It is intended to enable the calculation time. For this reason, the rest of the expression to detect the non-uniformity of the property value equation residual amount is the residual of the difference between the external force operators and terms section of the equation of motion, by the degree of matching of solutions of the equations of motion with boundary conditions of two types I want to output the property values to the extreme exponential product evaluation or the amount of linear sum of the conditional expression residual amount is the residual non-uniform detection type residual amount is the difference, of the constraints.計測対象内部の密度などの物性値が不均一に分布している場合にも、不均一性による屈折や多重反射などの現象に起因する画質劣化なく計測領域内の物性値の分布を実現可能な時間で算出可能とすることを目的とする。このため、運動方程式の演算子項と外力項の差分の残差である方程式残差量、2種類の境界条件による運動方程式の解の一致度により物性値の不均一性を検出する式の残差である不均一検出式残差量、制約条件の残差である条件式残差量の線形和又は指数関数積評価量を極値にする物性値を出力する。
