title: Broad-beam transmission data for new brachytherapy sources, Tm-170 and Yb-169.
abstract: The characteristics of the radionuclides (170)Tm and (169)Yb are highly interesting for their use as high dose-rate brachytherapy sources. The introduction of brachytherapy equipment containing these sources will lead to smaller required thicknesses of the materials used in radiation protection barriers compared with the use of conventional sources such as (192)Ir and (137)Cs. The purpose of this study is to determine the required thicknesses of protection material for the design of the protecting walls. Using the Monte Carlo method, transmission data were derived for broad-beam geometries through lead and concrete barriers, from which the first half value layer and tenth value layer are obtained. In addition, the dose reduction in a simulated patient was studied to determine whether transmission in the patient is a relevant factor in radiation protection calculations.
authors: Department of Atomic, Molecular and Nuclear Physics, University of Valencia and IFIC, C/Dr Moliner 50, E46100 Burjassot, Spain.
authors: Domingo
authors: D
authors: Granero
authors: José
authors: J
authors: Pérez-Calatayud
authors: Facundo
authors: F
authors: Ballester
authors: Adrie J J
authors: AJ
authors: Bos
authors: Jack
authors: J
authors: Venselaar
mesh_terms: D001918:Brachytherapy / Q000379:methods*; D002138:Calibration; D002588:Cesium Radioisotopes; D006801:Humans; D007496:Iridium Radioisotopes; D009010:Monte Carlo Method; D011868:Radioisotopes / Q000627:therapeutic use*; D011879:Radiotherapy Dosage; D013932:Thulium / Q000627:therapeutic use*; D015018:Ytterbium / Q000627:therapeutic use*
chemical_list: D002588:Cesium Radioisotopes; D007496:Iridium Radioisotopes; D011868:Radioisotopes; D013932:Thulium; D015018:Ytterbium