A5034304648- Advanced Radiotherapy Techniques
- Radiation Therapy and Dosimetry
- Radiation Dose and Imaging
- Medical Imaging Techniques and Applications
- Advanced X-ray and CT Imaging
- Radiation Detection and Scintillator Technologies
- Advances in Oncology and Radiotherapy
- Radiation Effects and Dosimetry
- Nuclear Physics and Applications
- Lung Cancer Diagnosis and Treatment
- Radiomics and Machine Learning in Medical Imaging
- Radiation Effects in Electronics
- Digital Radiography and Breast Imaging
- Management of metastatic bone disease
- Effects of Radiation Exposure
- Breast Cancer Treatment Studies
- Childhood Cancer Survivors' Quality of Life
- AI in cancer detection
- Atomic and Subatomic Physics Research
- Health Systems, Economic Evaluations, Quality of Life
- Head and Neck Cancer Studies
- Boron Compounds in Chemistry
- Multiple and Secondary Primary Cancers
- Particle Accelerators and Free-Electron Lasers
- Radiology practices and education
The University of Texas MD Anderson Cancer Center
2016-2025
Mayo Clinic
2025
The University of Texas Health Science Center at Houston
2015-2024
Johns Hopkins University
2020
Duke Medical Center
2014-2020
Swedish Medical Center
2019-2020
American Association of Physicists in Medicine
2019-2020
Ashland (United States)
2020
John Wiley & Sons (United States)
2020
UPMC Health System
2019-2020
The introduction of advanced techniques and technology in radiotherapy has greatly improved our ability to deliver highly conformal tumor doses while minimizing the dose adjacent organs at risk. Despite these tremendous improvements, there remains a general concern about normal tissues that are not target radiation treatment; any "nontarget" should be minimized as it offers no therapeutic benefit. As patients live longer after treatment, is increased opportunity for late effects including...
The American Association of Physicists in Medicine (AAPM) is a nonprofit professional society whose primary purposes are to advance the science, education and practice medical physics. AAPM has more than 8,000 members principal organization physicists United States. will periodically define new guidelines for physics help science improve quality service patients throughout Existing be reviewed purpose revision or renewal, as appropriate, on their fifth anniversary sooner. Each guideline...
Three commercial metal artifact reduction methods were evaluated for use in computed tomography (CT) imaging the presence of clinically realistic implants: Philips O-MAR, GE's monochromatic gemstone spectral (GSI) using dual-energy CT, and GSI with software applied (MARs). Each method was according to CT number accuracy, size streak severity by several phantoms, including three anthropomorphic phantoms containing implants (hip prosthesis, dental fillings spinal fixation rods). All showed...
Basic dosimetric properties of 6 MV and 18 photon beams from a Varian Clinac 21EX accelerator operating without the flattening filter have been measured. These include dose rate data, depth dependencies lateral profiles in water phantom, total scatter factors transmission multileaf collimator. The data are reviewed compared with measurements for flattened beams. unflattened following: higher by 2.3 (6 MV) 5.5 (18 on central axis; lower out-of-field due to reduced head softer spectra; less...
The dosimetric accuracy of treatment planning systems (TPSs) decreases for locations outside the field borders. However, true specific TPSs beyond borders is not well documented. Our objective was to quantify out-of-field dose predicted by commercially available Eclipse version 8.6 TPS (Varian Medical Systems, Palo Alto, CA) a clinical delivered on Varian Clinac 2100. We calculated (in TPS) and determined (with thermoluminescent dosimeters) doses at total 238 points measurement distance from...
This report describes the current state of flattening filter‐free (FFF) radiotherapy beams implemented on conventional linear accelerators, and is aimed primarily at practicing medical physicists. The Therapy Emerging Technology Assessment Work Group American Association Physicists in Medicine (AAPM) formed a writing group to assess FFF technology. published literature technology was reviewed, along with technical specifications provided by vendors. Based this information, supplemented...
Although treatment planning systems are generally thought to have poor accuracy for out‐of‐field dose calculations, little work has been done quantify this calculation inaccuracy modern techniques, such as intensity‐ modulated radiation therapy (IMRT), or understand the sources of inaccuracy. The aim is evaluate calculations by a commercial system (TPS), v.9.0, IMRT plans. Three plans were delivered anthropomorphic phantoms, and doses measured using thermoluminescent detectors (TLDs)....
Purpose: For nonsmall cell lung cancer (NSCLC) patients, quantitative image features extracted from computed tomography (CT) images can be used to improve tumor diagnosis, staging, and response assessment. these findings clinically applied, need have high intra intermachine reproducibility. The objective of this study is identify CT that are reproducible, nonredundant, informative across multiple machines. Methods: Noncontrast‐enhanced, test‐retest pairs were obtained 56 NSCLC patients...
Risk stratification and management paradigms for patients with cardiovascular implantable electronic devices (CIEDs) requiring radiotherapy (RT) vary widely are based on limited clinical data.To identify the incidence predictors of CIED malfunction describe associated consequences in a large cohort treated photon- electron-based RT.Retrospective analysis all functioning who underwent RT between August 2005 January 2014 interrogation data following at an academic cancer center. We identified...
The Global Quality Assurance of Radiation Therapy Clinical Trials Harmonization Group (GHG) is a collaborative group (RTQA) Groups harmonizing and improving RTQA for multi-institutional clinical trials. objective the GHG OAR Working was to unify contouring guidance across groups by compiling single reference list OARs in line with AAPM TG 263 ASTRO, together peer-reviewed, anatomically defined integration into trial protocols independent radiation therapy delivery technique.The comprised 22...
Several studies have shown that removal of the flattening filter from treatment head a clinical accelerator increases dose rate and changes lateral profile in radiation therapy with photons. However, multileaf collimator (MLC) used to shape field was not taken into consideration these studies. We therefore investigated effect MLC on flattened unflattened beams. To do this, we performed measurements Varian Clinac 21EX MCNPX Monte Carlo simulations analyze physical properties photon beam....
The aim of this paper is to determine the effect removing flattening filter from a linear accelerator on out-of-field photon dose. A Monte Carlo model was used simulate 6 MV and 18 beams Varian 2100 with in place it removed. doses composition (head leakage, patient scatter collimator scatter) were calculated square open fields water tank as function distance central axis, field size depth. resulting intensity-modulated radiation therapy prostate at also calculated, without filter, sensitive...