The Analysis of Mammalian Tissue into Lipid and Lipid-Free Fractions Using X and Gamma Radiation

The fat and fat-free (muscle) constituents of soft tissue have mass absorption coefficients which are sufficiently separated in the 10-100 keV range as to allow the relative proportions of each of these components to be non-destructively determined by photon absorptiometry. The use of a dual photon beam eliminates variations due to sample density and thickness, thus making the method suitable for in vivo as well as in vitro work.