title: A simple formula to determine the bolus thickness on an oblique surface.
abstract: For certain clinical situations such as breast treatments, a bolus is used and must be accounted for in monitor unit calculations. Because of the oblique incidence involved, the thickness of bolus traversed by the radiation beam, as opposed to its nominal thickness, must be used. Using principles of geometry, a simple method is derived to calculate the thickness of bolus for these calculations.
authors: Radiation Oncolgy, Cleveland Clinic, Wooster, OH. Electronic address: vosslem@ccf.org.
authors: Matthew
authors: M
authors: Vossler
mesh_terms: D000465:Algorithms; D006801:Humans; D011878:Radiotherapy
keywords: Bolus; Monitor unit calculations; Oblique incidence