The effect of multiple scattering of gamma-rays in NaI-detectors on the calculated photopeak efficiency values

Monte Carlo principles and applications

“…Probably the most widely known medical physics related application of Monte Carlo simulation is the determination of the efficiencies of gamma-ray detectors. Wachter, Ellett and Brownell (1960), Zerby (1963), Beattie and Byrne (1972), Holmberg and Rieppo (1973), S t e p , Huang and Harris (1973): Rieppo and Holmberg (1974) and Rieppo, Blomster and Holmberg (1975) have calculated the efficiencies of NaI(T1) scintillation detectors. Dunn and Gardner (1972) Berger and Raso 1960), with the most extensive and precise of these being that of Berger and Raso.…”

“…Refinements and expansions of their basic data are described in the reports of Brownell, Ellett and Reddy (1968), Ellett, Brownell and Reddy (1968), Ellett (1969), Snyder, Fisher, Ford andWarner (1969), Berger (1970) and Ellett and Humes (1971). Readers anticipating engaging in Monte Carlo calculations of the dose to a phantom immersed in an isotropic radiation flux are advised to consult the note by Ritchie (1973) to learn about a computational pitfall, and readers interested in the optimal design of Anger camera collimators are advised to consider the Monte Carlo style approach of Muehllehner and Luig (1973).…”

Absolute low-energy photopeak efficiency values for NaI(Tl) and Si(Li) detectors

“…The multiple scattering effect of the y rays (Rieppo and Holmberg 1974) has not been indicated due to the low energies of the y rays and the small volumes of the detectors.…”