title: Estimation of body fat in rats by whole-body counting.
abstract: A method for determining body fat in vivo in rats by whole-body counting of 40K is described. The technique utilizes a Nuclear Chicago Corporation TOBOR system with 5-in thallium-activated sodium iodide crystals. To test the method a regression equation was developed using the 40K counts and body weight of young adult rats weighing 333-788 g; the results were compared with those obtained from the gravimetric determination of fat in the carcass. The correlation coefficient between the two methods was 0.945.
mesh_terms: D000818:Animals; D001823:Body Composition; D001835:Body Weight; D008297:Male; D011197:Potassium Radioisotopes; D051381:Rats / Q000378:metabolism*; D014915:Whole-Body Counting
chemical_list: D011197:Potassium Radioisotopes