<P>PROBLEM TO BE SOLVED: To acquire new information about operations and functions of human brains, especially surgical treatment and/or injury or external wound. <P>SOLUTION: The blood oxygen saturation in vivo at a plurality of different internal regions is measured spectrophotometrically and monitored by applying a plurality of spectrophotometric sensors 16, 116 to a test subject 10 at each of corresponding sites and coupling each sensor to a control and processing station 20, operating these sensors spectrophotometrically to irradiate a particular region within the test subject, detecting and receiving the light energy resulting from the spectrophotometric irradiation across the deep and shallow paths, conveying signals corresponding to the light energy to the control and processing station, analyzing the conveyed signals to determine the regional blood oxygen saturation data, and visually displaying the data acquired from a plurality of examination sites and regions in a comparative manner. <P>COPYRIGHT: (C)2008,JPO&INPIT 
MULTI-CHANNEL NON-INVASIVE TISSUE OXIMETER