title: Quantitative and analytical comparison of isodose distributions for shaped electron fields from ADAC Pinnacle treatment planning system and Monte Carlo simulations.
abstract: We assess the accuracy of ADAC Pinnacle(3) commercial treatment planning system (TPS) in computation of isodose distributions for shaped electron fields. The assessment is based on comparison of dose profiles generated by TPS and a Monte Carlo model for different beam energies, applicator sizes, and percentages of field blocking. Dose differences of up to 14% are observed at the depth of maximum dose. These discrepancies, often ignored in clinical evaluations, are attributable to inadequate modeling of scatter from applicators and blocks by TPS.
authors.affiliation: University of Toledo Health Science Campus, Department of Radiation Oncology, Mail Stop 1151, 3000 Arlington Avenue, Toledo, OH 43614, USA. e.parsai@utoledo.edu
authors.forename: E Ishmael
authors.initials: EI
authors.lastname: Parsai
authors.forename: Diana
authors.initials: D
authors.lastname: Shvydka
authors.forename: Jun
authors.initials: J
authors.lastname: Kang
authors.forename: Philip
authors.initials: P
authors.lastname: Chan
authors.forename: David
authors.initials: D
authors.lastname: Pearson
authors.forename: Faheem
authors.initials: F
authors.lastname: Ahmad
mesh_terms: D004583:Electrons; D009010:Monte Carlo Method