Brachytherapy treatment simulation of strontium-90 and ruthenium-106 plaques on small size posterior uveal melanoma using MCNPX code

Development of A phantom for ophthalmic beta source applicator quality control using TL dosimetry

“…Absorbed dose values in water at TL dosimeter position were determined by Monte Carlo simulation using the MCNPX code. This procedure had been already validated by Barbosa and collaborators (Barbosa et al, 2014a(Barbosa et al, , 2014b. Dose values were divided by TL dosimeter responses and a calibration curve relating calibration factor versus water depth could be established.…”

“…Concave eye applicators with 90 Sr/ 90 Y and 106 Ru/ 106 Rh beta ray sources are usually used in brachytherapy for the treatment of intraocular tumors as choroidal/uveal melanoma with thickness up to 5 mm (Barbosa et al, 2014a(Barbosa et al, , 2014b. The steep dose gradient and the short range of electrons (beta particle) due to these applicators, make dosimetry in daily practice a very complex and imprecise procedure.…”

Adaptation and security validation of an irradiator suitable for use of cesium-137 sources

“…The Monte Carlo method has been used in numerous situations that present risks associated with the handling and use of radioactive sources [5][6][7]. Due to their small size, low fading, and easy reading, nanoDot OSL dosimeters based on Al2O3:C from Landauer have also been used in these types of situations [8] [9].…”

Technical Note: Monte Carlo study of106Ru/106Rh ophthalmic plaques including the106Rh gamma spectrum

“…106 Rh nuclei, however, decay with a certain probability to excited states of 106 Pd, which in turn decay emitting gamma rays of discrete energy values . This 106 Rh gamma spectrum has been neglected in all published studies on Monte Carlo simulation of 106 Ru/ 106 Rh plaques, as it was considered that its influence on the absorbed dose distribution was negligible. This assumption is an approximation that was not justified quantitatively in any publication.…”