نتایج جستجو برای: siemens primus linac

تعداد نتایج: 9554  

2017
H. Dowlatabadi A.A. Mowlavi M. Ghorbani

Objective The aim of the present study is to simulate 6 MV and 18 MV photon beam energies of a Siemens Primus Plus medical linear accelerator (Linac) and to verify the simulation by comparing the results with the measured data. Methods The main components of the head of Siemens Primus Plus linac were simulated using MCNPX Monte Carlo (MC) code. To verify the results, experimental data of perc...

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Journal: Journal of Biomedical Physics and Engineering 2017
A A Mowlavi, H Dowlatabadi, M Ghorbani, S Mohammadi,

Objective: The aim of the present study is to simulate 6 MV and 18 MV photon beam energies of a Siemens Primus Plus medical linear accelerator (Linac) and to verify the simulation by comparing the results with the measured data.Methods: The main components of the head of Siemens Primus Plus linac were simulated using MCNPX Monte Carlo (MC) code. To verify the results, experimental data of perce...

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Journal: :journal of biomedical physics and engineering 0
m t bahreyni toossi medical physics department, faculty of medicine, mashhad university of medical sciences, mashhad, iran b khajetash medical physics department, faculty of medicine, mashhad university of medical sciences, mashhad, iran m ghorbani medical physics department, faculty of medicine, mashhad university of medical sciences, mashhad, iran

background: one of the main causes of induction of secondary cancer in radiation therapy is neutron contamination received by patients during treatment. objective: in the present study the impact of wedge and block on neutron contamination production is investigated. the evaluations are conducted for a 15 mv siemens primus linear accelerator.  methods: simulations were performed using mcnpx mon...

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Journal: Journal of Biomedical Physics and Engineering 2018
A A Mowlavi, F Akbari H Dowlatabadi, M Ghorbani, S Mohammadi,

Introduction: Radiation therapy using electron beams is a promising method due to its physical dose distribution. Monte Carlo (MC) code is the best and most accurate technique for forespeaking the distribution of dose in radiation treatment of patients.Materials and Methods: We report an MC simulation of a linac head and depth dose on central axis, along with profile calculations. The purpose o...

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2010
Marcus Fischer Manuel Todorovic Eva Drud Florian Cremers

Double-focused muMLCs are able to create fields with steeper dose gradients at the field edges and are, therefore, an advancement in delivering stereotactic treatments. A double-focused muMLC has been installed at a Siemens Primus linear accelerator (linac) as a first research installation in Europe. The basic dosimetric parameters, such as leakage, output factors, depth-dose curves and penumbr...

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Journal: Iranian Journal of Medical Physics 2018
Ali Asghar Mowlavi, Mehdi Ghorbani Mona Azizi Zeinab Mohammadpoory

Introduction: One of scientific concern is increasing of unwanted neutron dose to the patient, in head and neck radiation therapy due to the presence of some isotopes in dental restorations and head of medical linac. The aim of this study is to measure the equivalent dose of thermal and fast neutron due to head of Siemens Primus Linac and a healthy tooth, Amalgam, Ni-Cr alloy a...

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Journal: :Advance Sustainable Science, Engineering and Technology (ASSET) 2023

Radiotherapy is the treatment of cancer by using electromagnetic and particle radiation. Nasopharyngeal Cancer (NPC) one difficult case to be treated in radiotherapy because its anatomical location. Precision radiation dose part Quality Assurance Program as key factor this treatment. Thus, it very important ensure that output Linear Accelerator (LINAC) matched with result Treatment Planning Sys...

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ژورنال: سنجش و ایمنی پرتو 2018
Hoseinnezhad, Masomeh, Mahdavi, Mohammad, Mahdavi, Seyyed Rabie Mahdi,

Monte Carlo method is the most accurate method for simulation of radiation therapy equipment. The linear accelerators (linac) are currently the most widely used machines in radiation therapy centers. Monte Carlo modeling of the Siemens Primus linear accelerator in 6 MeV beams was used. Square field size of 10 × 10 cm2 produced by the jaws was compared with TLD. Head simulation of Siemens accele...

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Journal: :Journal of Medical Physics 2015

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Journal: :Reports of Practical Oncology & Radiotherapy 2018

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