title: Monte Carlo dose calculations for a new ovoid shield system for carcinoma of the uterine cervix.
abstract: The dose distribution for an ovoid with a new tungsten shielding design was determined using Monte Carlo simulation. Standard Cesium-137 tube sources, tungsten shielding, and aluminum ovoid applicator were each modeled as a collection of solid objects. Dose was calculated in planes above, below, in front of, and on the sides of the colpostat. The Monte Carlo results were compared with the results from a parametrized calculation algorithm and good agreement was obtained. The dose distribution matrix derived from the parametrized algorithm can be used for clinical treatment planning.
authors.affiliation: Department of Radiation Oncology, Duke University Medical Center, Durham, North Carolina 27710, USA. weeks@radonc.duke.edu
authors.forename: K J
authors.initials: KJ
authors.lastname: Weeks
mesh_terms: D000465:Algorithms; D001918:Brachytherapy / Q000295:instrumentation* / Q000706:statistics & numerical data; D002588:Cesium Radioisotopes / Q000627:therapeutic use; D005260:Female; D006801:Humans; D008962:Models, Theoretical; D009010:Monte Carlo Method; D011835:Radiation Protection / Q000295:instrumentation*; D011874:Radiometry / Q000706:statistics & numerical data*; D011880:Radiotherapy Planning, Computer-Assisted; D014414:Tungsten; D002583:Uterine Cervical Neoplasms / Q000532:radiotherapy*
chemical_list: D002588:Cesium Radioisotopes; D014414:Tungsten