A5038984662- Radiation Dose and Imaging
- Advanced Radiotherapy Techniques
- Radiation Therapy and Dosimetry
- Parkinson's Disease Mechanisms and Treatments
- Sleep and Wakefulness Research
- Radioactivity and Radon Measurements
- Advanced X-ray and CT Imaging
- Radiation Detection and Scintillator Technologies
- Vestibular and auditory disorders
- Ophthalmology and Eye Disorders
- Advanced Optical Sensing Technologies
- COVID-19 diagnosis using AI
- Medical Imaging Techniques and Applications
- Advanced Neuroimaging Techniques and Applications
- Neurological disorders and treatments
- Restless Legs Syndrome Research
- Radiomics and Machine Learning in Medical Imaging
- Integrated Circuits and Semiconductor Failure Analysis
- COVID-19 Clinical Research Studies
- Radiology practices and education
- Advancements in Photolithography Techniques
- Effects of Radiation Exposure
- Digital Radiography and Breast Imaging
- Functional Brain Connectivity Studies
Mashhad University of Medical Sciences
2021-2024
Hormozgan University of Medical Sciences
2018-2020
Shahid Sadoughi University of Medical Sciences and Health Services
2018-2019
Yazd University
2018
Abstract Rapid eye movement behavior disorder (RBD) is a parasomnia characterized by the loss of skeletal muscle atonia during rapid (REM) sleep phase. On other hand, idiopathic RDB (iRBD) considered prelude various α‐synucleinopathies, including Parkinson's disease (PD), dementia with Lewy bodies and multiple system atrophy. Consequently, over 40% patients eventually develop PD. Recent neuroimaging studies utilizing structural magnetic resonance imaging (s‐MRI), diffusion‐weighted (DWI),...
Abstract Introduction A significant number of head computed tomography (CT) scans are performed annually. However, due to the close proximity thyroid gland radiation field, this procedure can expose ionising radiation. Consequently, study aimed estimate organ dose, effective dose (ED) and lifetime attributable risk (LAR) cancer from CT in adults. Methods Head 74 patients (38 males 36 females) were collected using three different scanners. Age, sex, scanning parameters, including scan length,...
To evaluate the dose calculation accuracy in Prowess Panther treatment planning system (TPS) using collapsed cone convolution (CCC) algorithm.The BEAMnrc Monte Carlo (MC) package was used to predict distribution of photon beams produced by Oncor® linear accelerator (linac). The MC model an 18 MV beam verified measurement a p-type diode dosimeter. Percent depth (PDD) and profiles were for comparison based on three field sizes: 5×5, 10×10, 20×20cm2. CCC dosimetry also evaluated plan composed...
Abstract Purpose: To examine detail depth dose characteristics of ideal proton beams using the GATE Monte Carlo technique. Methods: In this study, in order to improve simulation efficiency, we used pencil beam geometry instead parallel broad-field geometry. Depth distributions for energies from 5 250 MeV a water phantom were obtained. This study parameters named R peak , 90 80 73 50 full width at half maximum (FWHM), 80–20% distal fall-off ( W (80–20) ) and peak-to-entrance ratio represent...
↑What is "already known" in this topic:Understanding natural background radiation level, as the major source of human exposure to ionizing important because its impact on health.A number studies have assessed level many countries. →What article adds:In study, data showed that all cities 2 provinces Hormozgan and Sistan-Bluchestan had a lower than worldwide level.This study can be used reference for research design development regional surveys associated with measurement southeast Iran.
OBJECTIVE: This study aims to benchmark a Monte Carlo (MC) model of the 18 MV photon beam produced by Siemens Oncor ® linac using BEAMnrc and DOSXYZnrc codes. METHODS: By matching percentage depth doses profiles calculated MC simulations with measurements, initial electron parameters including energy, full width at half maximum (spatial FWHM), mean angular spread were derived for 10×10 cm 2 20×20 field sizes. The was then validated against measurements different sizes (5×5, 30×30 40×40 )...
OBJECTIVES:To evaluate the potential privileges of flattening filter-free (FFF) photon beams from Oncor® linac for 6 MV and 18 energies. METHODS:A Monte Carlo (MC) model was built using BEAMnrc MCCode verified by measured data A comprehensiv e set also characterized MC machine running with without filter (FF) in six field sizes. The investigated characteristics included mean energy, energy spectrum, spatial fluence, superficial dose, percent depth dose (PDD), output, out-of-field two indexes...
ABSTRACT Introduction Strong indications support the notion that idiopathic rapid eye movement (REM) sleep behavior disorder (iRBD) acts as a precursor to multiple α‐synucleinopathies, including Parkinson's disease and dementia with Lewy bodies. Despite numerous investigations into alterations in cortical thickness volume of subcortical areas associated this condition, comprehensive studies on surface morphology, focusing gyrification sulcal depth changes, are scarce. The purpose research...
Measurement of background radiations (BRs) as the sources cancer risk, is important. The aim this study was to measure BR, well its risk and mortalities in Kohgiluyeh Boyer-Ahmad province (KBAp). Indoors outdoors BRs were measured eight cities utilizing a Geiger-Muller detector. Five main locations (north, east, west, south, center) chosen for measuring outdoor indoor each city KBAp. BEIR VII-Phase 2 model used calculate induced risks various types at different ages. average dose rates 136.9...
Background: Measuring background radiation (BR) is highly important from different perspectives, especially that of human health. This study was conducted to measure BR in the southeast Iran. Methods: measured Hormozgan and Sistan-Bluchestan provinces using portable Environmental Radiation Meter Type 6- 80 detector. The average value used calculate absorbed dose rate indoor annual effective (AED) BR. In addition, excess lifetime cancer risk (ELCR) evaluated. Results: results showed maximum...
Introduction: The aim of this study was to investigate the initial electron beam parameters for Monte Carlo model 6MV photon produced by Siemens Oncor® linear accelerator. Materials and Methods: In study, EGSnrc user codes BEAMnrc DOSXYZnrc were used. beamnrc code used modelling a 6 MV linac’s head utilized calculating dose distributions in virtual water phantom. simulations started 10×10 cm2 40×40 field sizes. First energy changed match percent depth curves with those measurements....
Abstract To validate the GATE Monte Carlo simulation code and to investigate lateral scattering of proton pencil beams in major body tissue elements therapeutic energy range. In this study, was used compute absorbed dose fluence protons a water cubic phantom for clinical apply suitable physics model simulation, different lists were investigated. The present research also investigated optimal value ionization potential as parameter. Thereafter, beam profile simulated at energies depths...