Patent ID: 7831061
Filing Date: 2010-11-09
Classification: A61B

Abstract:
1. A system for noninvasively conducting polygraphic tests for determining the existence of stress on a living subject; said system comprising: a lidar radiation transmitter for transmitting a plurality of coherent lidar radiation pulses, in a particular optical frequency band that serves as a lidar data carrier; a lidar receiver for receiving returned lidar pulses from the subject, wherein between said transmitted and received pulses, respectively, there is a variable time delay that is associated with variable distances between the subject and the transmitter and receiver; said received pulses with variable delay containing information relating to a plurality of physiological characteristics of the subject indicative of stress of the subject; means for time-resolving each received pulse to analyze the delay and thereby the variable distances; an information-processing device in communication with said receiver for processing said variable time delay; and means for measuring frequency shifts in the carrier of said received pulses, which are a measure of the temperature of the subject.