Validation of the histogram technique for three-dimensional and two-dimensional dosimetric calculations

Abstract

Three-dimensional discrete dosimetric calculations were validated against an analytic approach for two simulated source distributions. The discrete approach was based on characterization of the source distribution by target-source distance histograms, including partial interval corrections. Using local submatrices and distance histograms, accurate dose rates were obtained for ⁹⁰Y, ¹³¹I and ⁶⁷Ga. Comparison of three- and two-dimensional calculations revealed that the latter were accurate, except for long range emitters.