CONTINUOUS MEASUREMENT OF THE HEAT-INDUCED CHANGES IN THE OPTICAL-PROPERTIES (AT 1,064-NM) OF RAT-LIVER

The radiative transfer optical properties (absorption coefficient, sca ttering coefficient, and anisotropy of scattering) of slowly heated ra t liver have been measured at 1,064 nm. Continuous measurements were m ade using double-integrating spheres and collimated illumination of th e sample for up to 5,000 seconds heating with equilibrium temperatures of 48 degrees, 52 degrees, and 58 degrees C. Generally, the scatterin g increased, and the absorption and anistropy decreased at rates depen dent on the heating temperatures. However, there was a large variabili ty between samples. (C) 1994 Wiley-Liss, Inc.