MEASUREMENTS WITH A WHOLE BODY COUNTER

Abstract
An account is given of work on the measurement of the gamma radioactivity of humans. A steel room has been constructed, in which this gamma activity may be measured to a statistical accuracy of a few per cent in 30 minutes using a 5-in. NaI crystal as detector. The average potassium content of thirty 19-year-old males living in Ontario has been found to be 0.212% of body weight, and the average Cs/K ratio 51 μμc/g K.