title: Radiochromic film as a radiotherapy surface-dose detector.
abstract: Radiochromic film is shown to be a useful surface-dose detector for radiotherapy x-ray beams. Central-axis percentage surface-dose results as measured by Gafchromic film for a 6 MVp x-ray beam produced by a Varian 2100C Linac at 100 cm SSD are 16%, 25%, 35%, 41% for 10, 20, 30 and 40 cm square field sizes, respectively. Using a simple, uniform light source and a CCD camera connected to an image analysis system, quantitative 3D surface doses are accurately attainable in real time as either numerical data, a black-and-white image or a colour-enhanced image.
authors.affiliation: Illawarra Cancer Care Centre, Department of Radiotherapy, Wollongong NSW, Australia.
authors.forename: M J
authors.initials: MJ
authors.lastname: Butson
authors.forename: J N
authors.initials: JN
authors.lastname: Mathur
authors.forename: P E
authors.initials: PE
authors.lastname: Metcalfe
mesh_terms: D055592:Biophysical Phenomena; D001703:Biophysics; D006801:Humans; D019047:Phantoms, Imaging; D011874:Radiometry / Q000295:instrumentation*; D011879:Radiotherapy Dosage; D011882:Radiotherapy, High-Energy; D012867:Skin / Q000528:radiation effects; D014962:X-Ray Film