Patent ID: 7330745

Claim:
A living body photometric apparatus comprising: a light source portion for irradiating light beams having predetermined frequencies to a plurality of positions in a measurement region of a subject during an interval including a period when giving a predetermined stimulation task to the subject and a period not giving the same; an optical measurement portion for measuring light beams brought about by the irradiated light beams at a position near the light beam irradiation position and for determining measurement data at a plurality of measurement points from the measured light beams; a signal processing portion for performing an imaging processing of the measurement data from the optical measurement portion and for calculating from the plurality of measured data at least one stimulation task signal of which a principal component is a signal brought about by the stimulation task given to the subject; means for calculating an occupying ratio of the plurality of respective measured data in the stimulation task signal; and a displaying means for displaying the stimulation task signal calculated and the calculated occupying ratio of the plurality of respective measured data in the stimulation task signal.