PROBLEM TO BE SOLVED: To provide a diagnosis support apparatus that, when a "region in which fibrosis is progressing" which is suspected of being a lesion part exists at an inner wall portion within a living organism, such as the biliary tract or the pancreatic duct, automatically detect the region to thereby support diagnosis.SOLUTION: An OCT apparatus 1 includes an arithmetic processing apparatus 90 that, based on light intensity data, calculates an evaluation value corresponding to a length from a measurement point that is set on a surface of the inner wall portion within the living organism to a boundary point at which the light intensity data with regard to a depth direction of the inner wall portion becomes a noise level. A measurement point at which the evaluation value is less than a predetermined threshold value is detected as a lesion part, and displayed.COPYRIGHT: (C)2012,JPO&INPIT【課題】胆道・膵管等の生体内の内壁部において、病変部の疑いのある「繊維化が進行している領域」が存在する場合に、その領域を自動で検出して診断支援を行う診断支援装置を提供する。【解決手段】OCT装置1の演算処理装置90は、光強度データに基づいて生体内部の内壁部の表面に設定された測定点から該内壁部の深さ方向に関して光強度データがノイズレベルとなる境界点までの長さに相当する評価値を算出する。そして、評価値が所定の閾値よりも小さくなる測定点を病変部として検出し、表示する。【選択図】図35
