A5025165738- Advanced Radiotherapy Techniques
- Radiation Therapy and Dosimetry
- Medical Imaging Techniques and Applications
- Radiation Dose and Imaging
- Radiation Detection and Scintillator Technologies
- Nuclear physics research studies
- Colorectal Cancer Surgical Treatments
- Advanced X-ray and CT Imaging
- Atomic and Molecular Physics
- Radiation Effects and Dosimetry
- Effects of Radiation Exposure
- Endometrial and Cervical Cancer Treatments
- Muon and positron interactions and applications
- Radiomics and Machine Learning in Medical Imaging
- Particle physics theoretical and experimental studies
- Nuclear Physics and Applications
- Colorectal and Anal Carcinomas
- X-ray Spectroscopy and Fluorescence Analysis
- Infection Control and Ventilation
- Advanced MRI Techniques and Applications
- Management of metastatic bone disease
- Carcinogens and Genotoxicity Assessment
- Lung Cancer Diagnosis and Treatment
- COVID-19 and healthcare impacts
- Prostate Cancer Diagnosis and Treatment
King Faisal Specialist Hospital & Research Centre
2016-2025
McGill University
2012-2025
Riyadh Elm University
2016
King Fahd Security College
2012-2016
Jewish General Hospital
2014-2015
McGill University Health Centre
2005-2015
Montreal General Hospital
2014
University of British Columbia
1993-2007
University of Kentucky
1994-1996
TRIUMF
1996
PURPOSE: Downstaging rectal carcinoma by preoperative radiotherapy decreases local recurrence, and recent phase II studies suggest that, in the lower one-third lesions, sphincter-preserving surgery can be considered. The purpose of current study was to assess efficacy toxicity endorectal high dose-rate brachytherapy as a downstaging treatment modality. METHODS: Patients with newly diagnosed invasive adenocarcinoma, T2 very early T4, operable tumors were eligible. A dose 26 Gy given over four...
The global coronavirus disease (COVID-19) pandemic of 2020 caused by SARS-CoV-2 resulted in a shortage filtering facepiece respirators (FFRs), such as N95 and KN95 masks. Ultraviolet-C (UV-C) irradiation has been proposed potential decontamination method to enable FFR reuse mitigate the shortage. This study aims evaluate impact UV-C on filtration efficiency (FE) various types RNA degradation. We evaluated effect (60-900 mJ/cm2) FE using particle sizes (PSs, 0.3-5 μm) representing seven...
The present study introduces the first magnetic characterization of a hydrogel dosimeter comprising acrylic acid synthesized within polyvinyl alcohol matrix. aims to accurately assess ionizing radiation dose distributions, making it valuable tool for radiotherapy treatment. was irradiated 1-60 Gy range using medical linear accelerator with rates 100-600 MU/min and beam energies 6, 10, 15 MV. developed by irradiation-triggered polymerization, polymerization degree indirectly quantified...
PurposeTo assess the extent of variation in radiosensitivity between individuals, gender-related dissimilarity and impact on association with single nucleotide polymorphisms (SNPs).Materials methodsSurvival curves 152 fibroblast cell strains derived from both gender were generated. Individual was characterized by surviving fraction at 2 Gy (SF2). SNPs 10 radiation responsive genes genotyped direct sequencing.ResultsThe wide SF2 (0.12–0.50; mean = 0.33) significantly associated 3 SNPs: TP53...
In this work we compare doses from imaging procedures performed on today's state-of-the-art integrated systems using a reference radiochromic film dosimetry system. Skin dose and profile measurements different were films at anatomical sites humanoid RANDO phantom. EBT3 was used to measure TomoTherapy MVCT system, while XRQA2 for kilovoltage (CBCT 21eX TrueBeam Varian linear accelerators CyberKnife stereoscopic orthogonal imagers). Maximum measured in cGy head, thorax, pelvis regions...
Muon capture $\ensuremath{\gamma}$ rays have been observed for the first time in $^{27}\mathrm{Al}$, and a significant improvement has made identification of \ensuremath{\gamma}-rays from muon natural Si. The (${\ensuremath{\mu}}^{\ensuremath{-}},\ensuremath{\nu}\ensuremath{\gamma}$) reaction was clearly both nuclei and, $^{28}\mathrm{Si}$, compares well with calculations. (${\ensuremath{\mu}}^{\ensuremath{-}},\ensuremath{\nu}n\ensuremath{\gamma}$) also strongly nuclei, levels which are...
Purpose: To commission Monte Carlo beam models for five Varian megavoltage photon beams (4, 6, 10, 15, and 18 MV). The goal is to closely match measured dose distributions in water a wide range of field sizes (from ). second objective reinvestigate the sensitivity calculated variations primary electron parameters. Methods: GEPTS code used simulations calculations. linear accelerator geometric are based on (i) manufacturer specifications, (ii) corrections made by Chibani Ma [“On discrepancies...
Impact of the various kVp settings used during computed tomography (CT) simulation that provides data for heterogeneity corrected dose distribution calculations in patients undergoing external beam radiotherapy with either high‐energy photon or electron beams have been investigated. The change Hounsfield Unit (HU) values due to influence and geometrical tissue substitute materials has also studied. impact density (ED) on accuracy calculation was found be well within 2%. In case distributions...
The photo catalytic degradation, a proven chemical process used for the decontamination of organic/inorganic pollutants and microorganisms in water was implemented. In this work selective killing cervical cancer cells (HeLa cells) by using nano-composite ZnO (Zinc Oxcide), WO3 (tungsten oxide) (n-WO3/ZnO) as photo-catalyst under irradiation visible light. All three nanostructured semiconducting materials (WO3, n-WO3/ZnO) were synthesized facile precipitation method their morphological...
Fractionated high dose rate endorectal brachytherapy (HDR‐EBT) using CT‐based treatment planning is an alternative method for preoperative down‐sizing and down‐staging of advanced rectal adeno‐carcinomas. The authors present image guidance procedure that was developed to ensure daily reproducibility the four fractions. Since applicator might not be placed before each fraction inside lumen in same manner as it during 3D CT volume acquisition used planning, there a shift along catheter axis...
In cases of nuclear and radiological accidents, public health emergency response need to assess the magnitude radiation exposure regardless whether they arise from disaster, negligence, or deliberate act. Here we report establishment a national reference dose–response calibration curve (DRCC) for dicentric chromosome (DC), prerequisite doses received in accidental exposures. Peripheral blood samples were collected 10 volunteers (aged 20–40 years, median = 29 years) both sexes (three females...
We report measurements of capture rates and hyperfine dependences in muon on $^{23}\mathrm{Na}$ to various states Ne F isotopes. also comparisons the for six \ensuremath{\rightarrow} $^{23}\mathrm{Ne}$ transitions with 1s-0d shell model empirical effective interaction Brown Wildenthal realistic Kuo Brown. Fits data yield an coupling ${\mathit{g}\mathit{\ifmmode \tilde{}\else \~{}\fi{}}}_{\mathit{a}}$ = -1.01 \ifmmode\pm\else\textpm\fi{} 0.07 ratio...