An approach for the efficiency calibration of whole body counters.
An approach is outlined for the evaluation of the efficiency of whole body counters using experimental data for a point source and Monte Carlo simulation of the efficiency of photon arrival at a large volume NaI(Tl) detector. The approach was applied to the measurement of an experimental whole body phantom. The experimental and the predicted efficiencies were found to differ from -2.5% to 8.4%. An investigation of the geometry dependence of the counting efficiency was made using theoretical dimensions of phantoms of different sizes. The relative geometry dependence was found to be less than 9% for the "Reference Man" and "Reference 10-y-old Child" phantoms.
Venturini
L
L
Instituto de Pesquisas Energéticas e Nucleares, Departamento de Radioproteção Ocupacional, Pinheiros, São Paulo, Brazil. lventur@net.ipen.br
Campos
V P
VP
Berti
E A
EA
D002138:Calibration; D006801:Humans; D009010:Monte Carlo Method; D014915:Whole-Body Counting / Q000592:standards*