Patent ID: 7715904

Claim:
A living body optical measurement system comprising: an irradiation unit adapted to irradiate light on a living body while alternately setting loading time during which load is applied to the living body and unloading time during which load is not applied to the living body, a measurement unit adapted to measure the living body transmitting light intensity by irradiating the light on the living body to obtain a measured signal, an arithmetic unit adapted to calculate a signal which corresponds to the fluctuation due to hemodynamic movement in the living body during a relaxation time, wherein the relaxation time is the time during which the signal has time to recover its intact form following the loading time and in which influence by application of the load remains during the unloading time, and wherein the calculation is done by eliminating the measured signal from the relaxation time and fitting a predetermined function, through use of a method of least squares, to the remaining unloading-time portions of the measured signal, and a display unit adapted to display a result calculated by said arithmetic unit.