Evaluation of hypothetical 153Gd source for use in brachytherapy

Abstract

Hypothetical153 Gd source a b s t r a c t BackgroundBrachytherapy is an advanced cancer treatment. In brachytherapy practice radioactive seeds or sources are placed inside or in a close vicinity of the tumor, irradiating a high radiation dose to the tumor while reducing the radiation exposure to the surrounding healthy tissues. Brachytherapy is a radiation therapy modality which is accounted as localized, precise and high-technology treatment. Photon emitting http://dx

Effects of Siemens TT-D carbon fiber table top on beam attenuation, and build up region of 6 MV photon beam

“…To reduce MC calculation uncertainties, several variance reduction techniques have been used. For example, the energy cut off for photons and electrons 39,40 were set at 10 and 1 keV, respectively. The photon and electron "importance" in all scoring cells were considered to be 50.…”

Determination of dosimetric parameters for shielded 153Gd source in prostate cancer brachytherapy

“…However, only TG-43 parameters were determined and the effect of rotational shield geometry on dosimetric aspects was not evaluated. In another study Ghorbani and Behmadi 20 calculated TG-43 parameters for the same hypothetical nonshielded 153 Gd source and compared them with dosimetric parameters of commercially available 192 Ir and 125 I sources. In the study by Ghorbani and Behmadi the effect of shielding was not considered, as it was not evaluated by the study of Enger et al .…”