PROBLEM TO BE SOLVED: To improve diagnosis accuracy by eliminating the variances due to individuals in image diagnosis, performed by comparing each tomographic image of the examinee and a normal person.SOLUTION: This system is equipped with storage parts 11, 12 for storing the voxel data of each tomographic image of the subject and a plurality of healthy persons, an AI data calculation part 23 for calculating the index (AI value), showing the asymmetry of each tomographic image of the subject and a plurality of persons to be compared by comparing the right and left sides of the same tomographic image, based on the voxel data of the tomographic image a Z-value calculation part 25 for calculating Z value by comparing the AI value of the tomographic image of the examinee with the AI values of each tomographic image of the plurality of persons to be compared, and a display control part 27 for displaying the tomographic image of the subject and the Z-value.COPYRIGHT: (C)2008,JPO&INPIT【課題】被験者と健常者の断層画像を比較して行う画像診断において、個人によるバラツキを無くし、診断の精度を向上させる。【解決手段】被験者及び複数の健常者の断層画像のボクセルデータを記憶する記憶部11,12と、断層画像のボクセルデータに基づいて、同一断層画像の左右の比較を行って、被験者及び複数の対比者の各断層画像の非対称性を示す指標(AI値)を算出するAIデータ算出部23と、被験者の断層画像のAI値と、数の対比者の断層画像のAI値とを比較してZ値を算出するZ値算出部25と、被験者の断層画像とZ値を表示させる表示制御部27と、を備える。【選択図】図1
