Dosimetric verification of a 3-D electron pencil beam dose calculation algorithm.
A three-dimensional electron beam dose calculational algorithm implemented for use in a three-dimensional treatment planning system is described. The 3-D electron beam calculations have been in use clinically for more than seven years. The algorithm uses a pencil beam model based on small angle multiple Coulomb scattering theory. Our implementation allows volumetric CT-based inhomogeneity corrections and provides for irregular field shapes (fields shaped with cerrobend cutouts) and the use of bolus. As part of NCI-funded work evaluating the state of the art in electron beam treatment planning, extensive algorithm verification was undertaken and results of these tests for our implementation are presented.
McShan
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DL
Department of Radiation Oncology, University of Michigan Medical Center, Ann Arbor 48109.
Fraass
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BA
Ten Haken
R K
RK
D000465:Algorithms; D055592:Biophysical Phenomena; D001703:Biophysics; D004583:Electrons; D006801:Humans; D008961:Models, Structural; D008962:Models, Theoretical; D009369:Neoplasms / Q000532:radiotherapy; D011879:Radiotherapy Dosage; D011880:Radiotherapy Planning, Computer-Assisted / Q000379:methods* / Q000706:statistics & numerical data; D012984:Software