title: Modelling the wedge shape for the virtual wedge.
abstract: We present a method to model the virtual wedge shape in a 3D treatment planning system as a physical wedge. The virtual wedge shape was determined using the measured dose profile of the virtual wedge at a chosen reference depth. The differences between the calculated and the measured dose profiles for the virtual wedge were within 0.5% at the reference depth, and within 2.5% at other depths. This method provides a fast and accurate way to implement the virtual wedge into our planning system for any wedge angles. This method is also applicable to model the physical wedge shapes with comparable good results.
authors.affiliation: Department of Radiation Oncology, Sinlau Christian Hospital, Tainan, Taiwan, Republic of China.
authors.forename: Liyun
authors.initials: L
authors.lastname: Chang
authors.forename: Sheng-Yow
authors.initials: SY
authors.lastname: Ho
authors.forename: Helen H W
authors.initials: HH
authors.lastname: Chen
mesh_terms: D055592:Biophysical Phenomena; D001703:Biophysics; D006801:Humans; D008962:Models, Theoretical; D009369:Neoplasms / Q000532:radiotherapy; D011880:Radiotherapy Planning, Computer-Assisted / Q000379:methods* / Q000706:statistics & numerical data; D011882:Radiotherapy, High-Energy / Q000379:methods / Q000706:statistics & numerical data; D014584:User-Computer Interface