This invention relates to a polygraph method utilizing cerebral blood flow analysis, comprising the steps of: (a) providing a near-infrared cerebral blood flow analyzer and wearing it on the head of a subject (b) utilizing the near-infrared cerebral blood flow analyzer to perform a basic brain testing to the subject and analyzing the active information of the cerebral cortex before answering questions (c) utilizing the near-infrared cerebral blood flow analyzer to establish the active information of cerebral cortex when the subject honestly answers yes or no (d) questioning the subject with the desired polygraph questions which the subject can answer whether yes or no only (e) comparing the active information of the cerebral cortex when the subject answers one of yes or no to the polygraph question to the active information of the cerebral cortex established in step (c) and (f) determining whether the subject is lying according to the comparison result in step (e). The method of this invention can accurately confirm whether the subject is lying with the comparison of the active information of the cerebral cortex by directly detecting the active status of the cerebral cortex, which is more direct with higher accuracy compared to the conventional method. Furthermore, the near-infrared cerebral blood flow analyzer has the advantages of convenience in carrying and simple in use, which has extreme growing potential in the future polygraph field.一種利用腦血流量分析的測謊方法,其步驟包括:(a)提供一近紅外線腦血流量分析儀並配戴於一受測者之頭部;(b)利用該近紅外線腦血流量分析儀對該受測者進行一大腦基本檢測,分析在未回答問題前的大腦皮質活躍資訊;(c)利用該近紅外線腦血流量分析儀建立該受測者在誠實回答「是」及「不是」之大腦皮質活躍資訊;(d)對該受測者提問所欲測謊的問題,且該受測者只能回答「是」或「不是」其中之一;(e)將該受測者對測謊問題回答「是」或「不是」其中之一大腦皮質活躍資訊與步驟(c)所建立的大腦皮質活躍資訊作比對;(f)根據步驟(e)的比對結果判定該受測者是否說謊。經由本發明之方法,可直接針對大腦皮質活躍狀態準確地由大腦皮質活躍資訊之比對得知受測者有無說謊,與習知方法相比更為直接且準確度高,且近紅外線腦血流量分析儀具有具有攜帶方便、使用簡單的優點,在未來的測謊器領域中將極具發展潛力。
