Mohammad Hassan Alamatsaz
Department of Physics, Isfahan University of technology, Isfahan, Iran
[ 1 ] - Monte Carlo Evaluation of Gamma Knife Dose Profile in Real Brain Phantom
Introduction The Gamma Knife system is designed solely for non-invasive treatment of brain disorders, and it benefits from stereotactic surgical techniques. Dose calculations required in the system are performed by GammaPlan code; in this code, brain tissue is considered uniform. In the present study, we evaluated the effect of Gamma Knife system on the obtained dose through simulating a real ...
[ 2 ] - استخراج ضریب انباشت تابشهای گاما به صورت تابع چند جملهای در حفاظهای کروی دولایهای (آب – سرب)
As the input of MCNP code (Monte Carlo N - Particle code system), a monoenergetic and isotropic point source with the energy rangeg from 0.3 to 10 MeV was placed at the center of a spherical material surrounded by another one. The first shielding material was water and the second one was lead. The total thickness of the shield varied between 2 to 10 mfp. Then, using the output of MCNCP, exposur...
[ 3 ] - محاسبه ضرایب انباشت پرتودهی تابشهای گاما برای چشمههای صفحهای و تیغههای دولایه آب و سرب و بررسی تاثیرات پراکندگی همدوس بر این ضرایب
In this work, gamma exposure buildup factors (E.B.F.) for plane sources and two-layer shields of water and lead were calculated. Also, coherent scattering effect usually left unattended in this type of geometry and application was considered. First, gamma EBFs were calculated by using MCNP, without considering coherent scattering effect for a normal and anisotropic plane source and double strat...
[ 4 ] - Calculation of the Equivalent Dose of the First and the Most Important Secondary Particles in Brain Proton Therapy by Monte Carlo Simulation
Introduction: Due to nuclear interactions between the tissues and high-energy protons, the particles, including neutrons, positrons, and photons arise during proton therapy. This study aimed at investigating the dose distribution of proton and secondary particles, such as positrons, neutrons, and photons using the Monte Carlo method. Material and Methods:<...
[ 5 ] - Assessment of absorbed dose uncertainty of prostate due to source relocating in brachytherapy by monte carlo method
Brachytherapy, is a method to treat prostate cancer in which a radiation source is placed inside or next to the cancer affected tissues. Purpose of this article is to determine the uncertainty level of received dose in prostate tissue due to the relocation of the placed radiation sources and inflation in prostate after positioning the radiation seeds. To simulate the model 6711 Amersham (activi...
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