A5086771853- Advanced Radiotherapy Techniques
- Medical Imaging Techniques and Applications
- Radiation Dose and Imaging
- Radiation Therapy and Dosimetry
- Management of metastatic bone disease
- Nuclear Physics and Applications
- Advances in Oncology and Radiotherapy
- Advanced X-ray and CT Imaging
- X-ray Spectroscopy and Fluorescence Analysis
- Electron and X-Ray Spectroscopy Techniques
- Endometrial and Cervical Cancer Treatments
- Nuclear physics research studies
- Hepatocellular Carcinoma Treatment and Prognosis
- Photoacoustic and Ultrasonic Imaging
- Head and Neck Cancer Studies
- Breast Cancer Treatment Studies
- Atomic and Molecular Physics
- Optical Imaging and Spectroscopy Techniques
- Brain Metastases and Treatment
- Spinal Fractures and Fixation Techniques
- Radiomics and Machine Learning in Medical Imaging
- Medical Imaging and Analysis
- Head and Neck Surgical Oncology
- Lung Cancer Diagnosis and Treatment
- Radiation Effects and Dosimetry
University of California, Irvine
2011-2023
University of California, Irvine Medical Center
2006-2019
King Faisal Specialist Hospital & Research Centre
2019
Irvine University
2012
UC Irvine Health
2007-2010
BC Cancer Agency
1999
Thunder Bay Regional Health Sciences Centre
1988-1991
Lakehead University
1991
University of Manitoba
1978-1983
The delivery accuracy of radiation therapy for pulmonary and abdominal tumors suffers from tumor motion due to respiration. Respiratory gating should be applied avoid the use a large target volume margin that results in substantial dose surrounding normal tissue. Precise respiratory requires exact spatial position determined real time during treatment. Usually, fiducial markers are implanted inside or next provide both accurate patient setup real‐time tracking. However, current tracking...
Abstract Radioembolization using Yttrium‐90 ( 90 Y) microspheres is widely used to treat primary and metastatic liver tumors. The present work provides minimum practice guidelines for establishing supporting such a program. Medical physicists play key role in patient staff safety during these procedures. Products currently available are identified their properties suppliers summarized. Appropriateness use the domain of treating physician. Patient up starts with pre‐treatment imaging. First,...
This is a retrospective analysis of new treatment modality, intra-arterial administration Yttrium-90 TheraSphere, for unresectable hepatocellular carcinoma (HCC). Patients with HCC not amenable to surgical who had satisfactory physiological function without comorbid disease or significant pulmonary shunting were eligible treatment. categorized into complete, partial, no response based on serum alpha-fetoprotein (AFP) levels and CT MRI imaging. Fourteen patients considered candidates Three...
A series of experiments were carried out to simulate air cavities in a polystyrene phantom. Dose was measured at air/polystyrene interface and as function depth. Results compared calculations done using three treatment planning systems. These systems employ Batho, modified the equivalent tissue–air‐ratio methods for inhomogeneity corrections. The dose decreased by 55% 5 cm gap, 5×5 2 field size, 6 MV photons. This has been attributed lack electronic equilibrium dispersion secondary particles...
A new method of generating beam intensity modulation filters for modulated radiation therapy (IMRT) is presented. The modulator was based on a reshapable material, which not compressible but can be deformed under pressure. two-dimensional (2D) piston array used to repeatedly shape the attenuating material. material mixture tungsten powder and silicon-based binder. linear attenuation coefficient measured 0.409 cm(-1) 6 MV x-ray beam. maximum thickness physical 10.2 cm, allowing transmission...
Residency programs leading to board certification are important for safe and competent Radiation Oncology (RO) practice. In some developing nations, there is a gap in this field. This work addresses the experience that was accomplished establish such program Iraq despite all challenges faces country under war.Descriptive report of faced still reeling from war, steps taken overcome these outcomes after graduation two classes.After over 18 months prerequisite technical logistical preparations,...
Vertebral metastases are a common manifestation of many cancers, potentially leading to vertebral collapse and neurological complications. Conventional treatment often involves percutaneous vertebroplasty/kyphoplasty followed by external beam radiation therapy. As more convenient alternative, we have introduced radioactive bone cement, i.e. cement incorporating radionuclide. In this study, used previously developed Monte Carlo transport modeling method evaluate dose distributions from...
Spinal metastases are a common and serious manifestation of cancer, often treated with vertebroplasty/kyphoplasty followed by external beam radiation therapy (EBRT). As an alternative, we have introduced radioactive bone cement, i.e. cement incorporated radionuclide. In this study, present Monte Carlo transport modeling method to calculate dose distributions within vertebrae containing cement. Model accuracy was evaluated comparing model-predicted depth–dose curves those measured...
The theoretical description of double ionization followed by the emission a single photon is critically examined. Some numerical calculations based on existing models are carried out and results obtained subjected to an experimental test in suitably designed experiment. doubt cast accuracy with which describe process.
Deuteron breakup cross sections induced by 28.6 MeV protons have been measured in collinear and noncollinear geometry the results compared with an exact three-body calculation using Doleschall code. This includes two-body interactions $S$ $P$ waves and, addition, a tensor force. The agreement experiment all cases is excellent. No evidence seen for collinearity enhancement.NUCLEAR REACTIONS $^{2}\mathrm{H}(p,2p)n$, $E=28.6$ MeV; section geometry; calculation.
Dosimetry measurements have been carried out for the electron beams produced by a linear accelerator at energies 6, 8, 10, 14, 18, and 21 MeV. Characteristic parameters of central axis dose distributions were derived compared to corresponding values from other accelerators in clinical use where such comparison is appropriate. A comprehensive set dosimetric provided beam treatment planning. The data include depth dose, range–energy parameters, penumbra uniformity.