title: The electron-dose distribution surrounding an 192Ir wire brachytherapy source investigated using EGS4 simulations and GafChromic film.
abstract: The steep dose gradient around 192Ir brachytherapy wire implants is predicted by the EGS4 (PRESTA version) Monte Carlo simulation. When considering radiation absorbing regions close to the wire source, the accurate dose distribution cannot be calculated by the GE Target II Sun Sparc treatment-planning system. Experiments using GafChromic film have been performed to prove the validity of the EGS4 user code when calculating the dose close to the wire source in a low energy range.
authors.affiliation: Department of Physics and Materials Science, City University of Hong Kong, Kowloon.
authors.forename: Y C
authors.initials: YC
authors.lastname: Cheung
authors.forename: P K
authors.initials: PK
authors.lastname: Yu
authors.forename: E C
authors.initials: EC
authors.lastname: Young
authors.forename: C L
authors.initials: CL
authors.lastname: Chan
authors.forename: M F
authors.initials: MF
authors.lastname: Ng
authors.forename: F N
authors.initials: FN
authors.lastname: Tang
authors.forename: T P
authors.initials: TP
authors.lastname: Wong
mesh_terms: D001918:Brachytherapy / Q000295:instrumentation* / Q000379:methods; D003198:Computer Simulation; D007496:Iridium Radioisotopes; D009010:Monte Carlo Method; D019047:Phantoms, Imaging; D011879:Radiotherapy Dosage; D011880:Radiotherapy Planning, Computer-Assisted; D014962:X-Ray Film
chemical_list: D007496:Iridium Radioisotopes