Optical Characterization of Internal Organs in-situ by He-Ne Laser Light Reflectometry

Abstract

The measurement of He-Ne laser light reflectance of various internal organs in-situ, to obtain the absorption and scattering parameters, is carried out. The laser reflectometer is consisting of an optical fibre- Y guide probe. Through one arm of this the laser beam is guided to the various internal organs of the anasthetized mongrel dogs. The reflected radiations from the tissue site are collected by another arm of the probe and detected by HAD-1000A photodetector—amplifier assembly. The results show that the reflectance of the internal organs varies over a large range and is the maximum at the arch of aorta and the minimum at the spleen. The optical parameter, the scattering and absorption coefficients, calculated based on the above data show variation related to their tissue compositions.