Somayeh Gholami
M.Sc., Nuclear Engineering Dept., Shahid Beheshti University, Tehran, Iran
[ 1 ] - Gamma Knife Simulation Using the MCNP4C Code and the Zubal Phantom and Comparison with Experimental Data
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...
[ 2 ] - The influence of neutron contamination on pacemaker in photon beam radiotherapy by LINAC using the Monte Carlo method
In radiation therapy with high-energy photon beams (E > 10 MV) neutrons are generated mainly in LINACs head thorough (γ,n) interactions. These neutrons affect the shielding requirements in radiation therapy rooms. According to the AAPMTG-34 report, photon absorbed dose of 10Gy can cause permanent damage to the pacemaker and the dose of 2Gy can make minor changes in the functioning of the pac...
[ 3 ] - Investigation of the dose enhancement effect of spherical bismuth oxide nanoparticles in external beam radiotherapy
Introduction: External radiotherapy is the most common method of radiotherapy which the most important problem associated with is that there is no difference between healthy and tumor tissues in dose absorption. One way to differentiate the dose sensitivity is to use metal-based nanoparticles. Bismuth oxide nanoparticles are good candidates for cancer radiotherapy. In this study, we investigate...