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A photon dose distribution model employing convolution calculations
Author(s) -
Boyer Arthur,
Mok Ed
Publication year - 1985
Publication title -
medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.473
H-Index - 180
eISSN - 2473-4209
pISSN - 0094-2405
DOI - 10.1118/1.595772
Subject(s) - convolution (computer science) , photon , imaging phantom , optical transfer function , fourier transform , physics , dosimetry , diffusion , computational physics , optics , computer science , nuclear medicine , medicine , quantum mechanics , machine learning , artificial neural network , thermodynamics
A three‐dimensional photon beam calculation is described which models the primary, first‐scatter, and multiple‐scatter dose components from first principles. Three key features of the model are (1) a multiple‐scatter calculation based on diffusion theory, (2) the demonstration of the modulation transfer function of the radiation dose transport process, and (3) the use of the finite fast Fourier transform to perform the required convolutions. The results of calculations for cobalt‐60 in a homogeneous phantom are used to verify the accuracy of the model.