Introduction: Nowadays new radiochromic films have an essential role in radiotherapy dosimetry. Properties such as high sensitivity, good reproducibility, high spatial resolution, easy readout and portability have made them attractive for dosimetry, especially in high-dose-gradient regions. Material and Methods: In this study, electron-beam dose distributions in homogenous and heterogeneous pha...

BACKGROUND Treatment of choroidal melanoma with radiation often involves placement of customized brachytherapy eye-plaques. However, the dosimetric properties inherent in source-based radiotherapy preclude facile dose optimization to critical ocular structures. Consequently, we have constructed a novel system for utilizing small beam low-energy radiation delivery, the Beamlet Low-kVp X-ray, or ...

The effect of substitution Pb2O3 by CuO content was studied for 75% Li2B4O7 + (25 − x)Pb2O3 xCuO glass system where x = 0, 5, 10, 15, 20, and 25 wt%. mechanical radiation shielding properties were evaluated the investigated samples. included Young's, shear, bulk, longitudinal, Poisson ratio, micro-hardness computed theoretically based on packing factor (Vi) dissociation energy (Gi) metal oxides...

The Message Passing Interface (MPI) technique is an old solution and improvement on the Monte Carlo N-Particle Transport (MCNP) method’s enormous computational time, which has not been evaluated based PHITS code—a recently developed simulation code. We conducted simulations Varian Clinac iX 6MV phase space data from IAEA. Venselaar et al.’s method criteria were used to validate simulation. PC c...

  Determination of the total body absorbed dose consists of two parts: Beta radiation absorbed dose and gamma radiation absorbed dose. The first part is generally determined by clinical data, while the second part has a parameter called absorbed ratio and is determined by computational methods. The Monte-Carlo computational methods have been shown to be the most suita...

Introduction: Development of a novel radiopharmaceutical needs assessment of its biological- distribution in animal models, most commonly mice prior to its common application. This study describes the biodistribution and absorbed dose prediction 131I-MIBG in human organs after injection in mice.   Materials and Methods: In this research, 131I-MIBG radiopha...

Introduction: Gamma Knife is an instrument specially designed for treating brain disorders. In Gamma Knife, there are 201 narrow beams of cobalt-60 sources that intersect at an isocenter point to treat brain tumors. The tumor is placed at the isocenter and is treated by the emitted gamma rays. Therefore, there is a high dose at this point and a low dose is delivered to the normal tissue surroun...