title: Dosimetry of large, irregularly shaped fields by the circle method. A feasibility study.
abstract: The Circle Method is an algorithm for dose calculation in an irregularly shaped field. The algorithm is based on measurements of circle fields at the therapy machine in use. A separation into primary and scattered radiation components is not necessary. Clarkson's sector-integration method and an off-axis correction are embodied. Experimental and calculated dose values agree within +/- 2.8% in the treatment field and under block shieldings.
authors.affiliation: University of Marburg, Germany.
authors.forename: A
authors.initials: A
authors.lastname: Hartmann
authors.forename: O
authors.initials: O
authors.lastname: Neidel
authors.forename: R
authors.initials: R
authors.lastname: Pfab
authors.forename: G
authors.initials: G
authors.lastname: Schmitt
mesh_terms: D000465:Algorithms; D005240:Feasibility Studies; D011874:Radiometry / Q000379:methods*