Dosimetry of 192Ir wires for LDR interstitial brachytherapy following the AAPM TG-43 dosimetric formalism.
Implementation of the AAPM Task Group 43 dosimetric formalism for 192Ir wires used as interstitial sources in low dose-rate (LDR) brachytherapy applications is investigated. Geometry factors, dose-rate constant values, radial dose functions, and anisotropy functions, utilized in this formalism, were calculated for various lengths of all commercially available wire source designs by means of a well-established Monte Carlo simulation code and an improved modification of the Sievert integral method. Results are presented in the form of look up tables that allow interpolation for dose-rate calculations around all practically used wire lengths, with accuracy acceptable for clinical applications.
Physics Department, University of Athens, Panepistimioupolis, Ilisia, Greece.
P
P
Karaiskos
P
P
Papagiannis
A
A
Angelopoulos
L
L
Sakelliou
D
D
Baltas
P
P
Sandilos
L
L
Vlachos
D016880:Anisotropy; D001699:Biometry; D055592:Biophysical Phenomena; D001703:Biophysics; D001918:Brachytherapy / Q000295:instrumentation / Q000379:methods* / Q000706:statistics & numerical data; D006801:Humans; D007496:Iridium Radioisotopes / Q000627:therapeutic use*; D009010:Monte Carlo Method; D011880:Radiotherapy Planning, Computer-Assisted / Q000379:methods* / Q000706:statistics & numerical data; D012542:Scattering, Radiation
D007496:Iridium Radioisotopes