PROBLEM TO BE SOLVED: To quantitatively determine a mental disease by preventing stress on a subject and noise in a defective contact, etc., when detecting physiological indexes correlating with a brain activity.SOLUTION: When a plurality of different stimulations to induce an emotional change are given to a subject, temperature (infrared intensity) in the parietal region of the subject is detected, based on an infrared image photographed by an infrared camera 12, so as to calculate the fluctuation amplitude of the temperature in the parietal region. Whether or not the subject suffers the mental disease to be determined is determined by comparing the calculated fluctuation amplitude with a threshold which is previously stored as a value, where a patient with the mental disease to be determined and a sound person are separable, based on fluctuation amplitude calculated from the temperature of a head part, that is detected when giving the same stimulations to the patient, and fluctuation amplitude calculated from the temperature of the head part, that is detected when giving the same stimulations to the sound person.COPYRIGHT: (C)2012,JPO&INPIT【課題】脳活動と相関がある生理指標を検出する際の被験者へのストレス及び接触不良等のノイズを防止して、精神疾患を定量的に判定する。【解決手段】被験者に情動変化を誘起する複数の異なる刺激を与えたときに、赤外線カメラ12で撮影された赤外画像から、被験者の頭頂部の温度(赤外強度)を検出し、頭頂部の温度の変動振幅を算出する。算出した変動振幅と、判定対象の精神疾患の患者に同様の刺激を与えたときに検出された頭部の温度から算出された変動振幅と、健常者に同様の刺激を与えたときに検出された頭部の温度から算出された変動振幅とに基づいて、患者と健常者とを分離可能な値として予め記憶された閾値とを比較して、被験者が判定対象の精神疾患か否かを判定する。【選択図】図3
