MEDICAL LINEAR ACCELERATOR
Estimate of photonuclear reaction in a medical linear accelerator using a water-equivalent phantom
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In recent radiotherapy techniques, neutrons are generated when the incident photon energy is higher than the threshold of reaction. Reactions occur in the various target materials, as well as in the flattening filters and collimators comprising the head structure of the
Commissioning of TrueBeamTM medical linear accelerator : quantitative and qualitative dosimetric analysis and comparison of flattening filter (FF) and flattening
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Motive of the study is to present quantitative and qualitative analysis and comparison of beam data measurement with FF (flattening filter) and FFF (flattening filter free) beam in a Varian TrueBeamTM Medical Linear Accelerator . Critique of beam characterization and
Simulation of neutron production at a medical linear accelerator
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Radiation therapy is an established way of cancer treatment. This is somehow ironic as radiation is highly carcinogenic. Radiotherapy delivers high doses of radiation to a targeted volume, which are highly toxic, even to tumor cells. This leads to the main challenge in
Medical isotope production using a 60 MeV linear electron accelerator
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Medical isotopes can be produced by reactors and accelerators . For certain isotopes there could be an advantage to a certain production method. For example; in some cases production via the (γ, n) or (γ, p) reaction has advantages that include high production yield
The effect of field size and distance from the field center on neutron contamination in medical linear accelerator
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Objective: Using Megavoltage photons generated by medical linear accelerator is a common modality for the treatment of malignant. The crucial problem for using photon beams> 8MV is the photoneutron yields that increase the risk of secondary cancer that
Accident in a linear electron accelerator for medical use
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Early in 1993, at a medical centre located in a north-eastern city in Argentina, the first 32 patients treated with a 6 MV photon beam electron linear accelerator , were accidentally irradiated for a total five weeks period at about twice the expected dauy dose rates. The
Linear electron accelerator for the medical isotopes production
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Since few years the main part of the Kharkov 2 GeV Linac Team have been involved in the investigations on the development of the medical radionuclides production technology by use linear electron accelerators. During design complete inter alia the channels of 99Mo
Development of side coupled X-band medical linear accelerator for radiotherapy
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Recently, LINAC-based radiotherapy equipment are being developed by combining with imaging devices such as CT or MRI, so that it is possible to precisely focus high dose radiation on tumor tissues while minimizing the normal tissue damage. In order to place the
Histogram based bremsstrahlung radiation source model for the Cyberknife medical linear accelerator
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The accuracy of dose calculations is of fundamental importance in treatment planning of radiation therapy. The dose distributions must be calculated and verified by an accurate algorithm. The Monte Carlo simulation (statistical method, based on random sampling) of
A directional spectrum model for a 6 MV photon beam from an Elekta SLi medical linear accelerator
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In the simulation of a 6MV photon beam from an Elekta SLi medical linear accelerator , a phase space file recording all the particles crossing a surface downstream of the monitor chamber was created. Since a phase space file is large and inconvenient to manipulate
Probabilistic Safety Assessment (PSA) of the radiotherapy treatment process with an Electron Linear Accelerator (LINAC) for Medical Uses.
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This paper presents the results of the Probabilistic Safety Assessment (PSA) to the radiotherapy treatment process with an Electron Linear Accelerator (LINAC) for Medical Uses, which was conducted in the framework of the Extra budgetary Programme on Nuclear
THE POSSIBILITY OF 99mTc ISOTOPE PRODUCTION FOR MEDICAL APPLICATION ON THE BASE OF LINEAR ELECTRON ACCELERATOR LUE50 OF THE
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We describe the process of radioactive 99mTc isotope production through irradiation of molybdenum by the intensive secondary photon beam of the Linear Electron Accelerator (LUE50) of the Yerevan Physics Institute. An experimental setup for the irradiation has been
CONTROL SYSTEM FOR SIDDHARTH MEDICAL LINEAR ACCELERATOR
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Abstract Indigenously developed 6 MV SIDDHARTH* Medical Linear accelerator is successfully installed and commissioned at two different locations in India. So far more than 30,000 various cancer patients has been treated using SIDDHARTH Medical Linear
MEDICAL LINEAR ACCELERATOR
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Because electromagnetic transitions tend to occur with small changes of angular momenta,(7, 7) reactions have the potential of offering insights into nuclear structure that could be rather unique. Although thu literature on such reactions spans nearly 50 years, 1
OCCUPATIONAL EXPOSURE AT HIGH ENERGY MEDICAL LINEAR ACCELERATOR
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Personell working in area exposed to radiation, due to safety reasons, requires premanent monitoring. Medical staff who work near radiation source must be protected as much as possible. Having that in mind, quality controle must be performed occasionally. In this study
Dosimetry of virtual photon energies of a medical linear accelerator
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Photon energy numbers of a medical linear accelerator (LINAC) are limited because of technical limitation. In generally, medical LINACs are produced with two photons energies such as 6 and 18 MV. But some clinical situations, such as tangential breast irradiation
MCNP4C3-BASED SIMULATION OF A MEDICAL LINEAR ACCELERATOR
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The general purpose MCNP4c3 code was employed to calculate the dosimetric characteristics of the photon beams of 6 and 15MV from a Varian Clinac 2100 C/D. The entire geometry, including the accelerator head and the water phantom, was simulated to
Doses to patients from photoneutrons emitted in a medical linear accelerator
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This study of doses to patients from emitted photoneutrons in a medical linear accelerator (Varian 2100C) was carried out. Dose calculation was performed using Monte Carlo Geant4 code. The model was used to calculate the neutron fluence, as a function of the neutron
Direct Measurement of Medical Linear Accelerator Electron Beam Width at Scattering Foil Position
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Purpose: The aim of this study was to develop a method for the direct measurement of electron beam width and distribution at the scattering foil on the carrousel in a medical linear accelerator gantry head, which differs from an existing indirect method for measuring the
Collimator Motion Control System Upgrade for Medical Linear Accelerator Project at SLRI
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A prototype of the 6-MeV medical linear accelerator has been under development at Synchrotron Light Research Institute (SLRI). A set of secondary collimators is utilized with different size arrangement for beam shaping purpose. To produce the desired field size of