Qualitative and quantitative assessment of the effect of respiratory movement on right lung tumors in PET/CT images [PDF]
مجله علوم و فنون هستهای, 2020 For specific clinical diagnoses, positron emission tomography (PET) can detect more sites of disease than conventional anatomical imaging such as x-ray computed tomography (CT) or magnetic resonance imaging (MRI).
F. Gholami +4 more
doaj +1 more source
Radiation damage and yield strength calculations in the pressure vessel of WWER-1000 reactor and sensitivity analysis of neutron spectrum on the shield of vessel [PDF]
مجله علوم و فنون هستهای, 2021 Radiation damage calculation is very important for estimating the lifetime of nuclear power plant instruments. The purpose of the present study is to evaluate the sensitivity of the damage values to the neutron group energy, where the neutron flux rate ...
E. Moslemi-Mehni +3 more
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Contrast evaluation of digital industrial radiography images using FLUKA simulation [PDF]
مجله علوم و فنون هستهای, 2020 Monte Carlo method is widely used for simulation of industrial and medical radiography due to its powerful ability to simulate statistical phenomena such as radiation generation and transport, and detection processes.
M. Khodakarami +2 more
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Parametric studies for a gas centrifuge using numerical method in OpenFOAM [PDF]
مجله علوم و فنون هستهای, 2021 In order to increase the performance of a gas centrifuge used in the uranium enrichment industry, the gas flow field inside it is studied and simulated.
V. Ghazanfari +4 more
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Measuring the temperature variation of refractive index of water by digital interferometry for manufacturing an optical dosimeter [PDF]
مجله علوم و فنون هستهای, 2020 Using coherent light sources for manufacturing optical dosimeters is of considerable interest. Optical dosimeters are mostly employed for radiotherapy applications; where knowing the temperature dependency of refractive index of the used material in the ...
S. Salimi Meidanshahi +3 more
doaj +1 more source
Favorable experimental conditions for differential cross-section measurement of PIGE reactions using the van de graaff accelerator of tehran [PDF]
مجله علوم و فنون هستهای, 2021 The present research aims to measure the physical parameters affecting the differential cross-sections of PIGE reactions in the 45˚R beamline of the Van de Graaff accelerator.
A. Jokar, O. Kakuee, M. Lamehi-Rachti
doaj +1 more source
Effects of sewage sludge irradiation on uptake of macronutrients and sodium in basil plant under greenhouse conditions [PDF]
مجله علوم و فنون هستهای, 2020 Effects of 0, 15, 30 and 60 g per kg of sewage sludge exposed to gamma irradiation at doses of 0, 5, 10 and 20 kGy were investigated on macronutrients and sodium uptakes in the basil root and shoot. The results showed that using 15 and 30 g sewage sludge
B. Asgari Lajayer +4 more
doaj +1 more source
Image reconstruction of proton computed tomography modelled by Geant4 Monte Carlo toolkit [PDF]
مجله علوم و فنون هستهای, 2021 Accuracy in the treatment planning of proton therapy depends on the accuracy of the information used to calculate the relative stopping power of tissues in the patient's body.
E. Alibeigi +3 more
doaj +1 more source
Carbon therapy of brain tumors and the effect of phantom compositions on dose calculations using Monte Carlo simulations [PDF]
مجله علوم و فنون هستهای, 2021 Due to the unique properties of carbons in depth-dose deposition, this study investigated the carbon therapy of brain tumors using the Geant4 toolkit. To see the effect of phantom material on the dose calculations, three phantoms consisting of realistic ...
M. Ahmadi +2 more
doaj +1 more source
Simulation of two-phase flow drift flux model in a vertical channel using Newton–Krylov method [PDF]
مجله علوم و فنون هستهای, 2021 In the present work, a numerical method is proposed in order to model the subcooled boiling flow in a vertical channel using the Drift Flux Model. The system of nonlinear equations is solved with the fully-implicit scheme using the Jacobian-free Newton ...
H. Esmaili +3 more
doaj +1 more source