A5035216747- Advanced Radiotherapy Techniques
- Radiation Therapy and Dosimetry
- Radiation Dose and Imaging
- Medical Imaging Techniques and Applications
- Advanced X-ray and CT Imaging
- Advances in Oncology and Radiotherapy
- Radiation Detection and Scintillator Technologies
- Advanced MRI Techniques and Applications
- Radiation Effects and Dosimetry
- Lung Cancer Diagnosis and Treatment
- Radiomics and Machine Learning in Medical Imaging
- Biomedical and Engineering Education
- Radiology practices and education
- Prostate Cancer Diagnosis and Treatment
- Management of metastatic bone disease
- Nuclear Physics and Applications
- MRI in cancer diagnosis
- Health and Medical Research Impacts
- Prostate Cancer Treatment and Research
- Lanthanide and Transition Metal Complexes
- Breast Cancer Treatment Studies
- Radiation Effects in Electronics
- Graphite, nuclear technology, radiation studies
- Health Systems, Economic Evaluations, Quality of Life
- Digital Radiography and Breast Imaging
The University of Texas MD Anderson Cancer Center
2014-2024
Cooper University Health Care
2022
University of Santo Tomas Hospital
2017
University of Houston
2014-2017
Radiation Oncology Associates
2007-2016
Elekta (United States)
2015
University of South Australia
2015
Elekta (United Kingdom)
2015
University of Wisconsin–Madison
2015
The University of Texas Health Science Center at Houston
2012-2014
Since publication of the American Association Physicists in Medicine (AAPM) Task Group No. 43 Report 1995 (TG-43), both utilization permanent source implantation and number low-energy interstitial brachytherapy models commercially available have dramatically increased. In addition, National Institute Standards Technology has introduced a new primary standard air-kerma strength, dosimetry literature grown substantially, documenting improved methodologies dosimetric characterization particular...
The U.S. National Council on Radiation Protection and Measurements United Nations Scientific Committee Effects of Atomic each conducted respective assessments all radiation sources in the States worldwide. goal this article is to summarize combine results these two publicly available surveys compare with historical information. In 2006, about 377 million diagnostic interventional radiologic examinations 18 nuclear medicine were performed. accounts for 12% procedures one-half performed...
A new formulation of a tissue-equivalent polymer-gel dosimeter for the measurement three-dimensional dose distributions ionizing radiation has been developed. It is composed aqueous gelatin infused with acrylamide and N, N'-methylene-bisacrylamide monomers, made hypoxic by nitrogen saturation. Irradiation gel, referred to as BANG, causes localized polymerization which, in turn, reduces transverse NMR relaxation times water protons. The dependence rate, R2, reproducible (less than 2%...
The increasing complexity of modern radiation therapy planning and delivery challenges traditional prescriptive quality management (QM) methods, such as many those included in guidelines published by organizations the AAPM, ASTRO, ACR, ESTRO, IAEA. These have traditionally focused on monitoring all aspects functional performance radiotherapy (RT) equipment comparing parameters against tolerances set at strict but achievable values. Many errors that occur oncology are not due to failures...
An addendum to the AAPMˈs TG‐51 protocol for determination of absorbed dose water in megavoltage photon beams is presented. This continues procedure laid out but new k Q data beams, based on Monte Carlo simulations, are presented and recommendations given improve accuracy consistency protocolˈs implementation. The components uncertainty budget determining at reference point introduced magnitude each component discussed. Finally, experimental N D,w coefficients It expected that implementation...
Purpose: Recommendations of the American Association Physicists in Medicine (AAPM) and European Society for Radiotherapy Oncology (ESTRO) on dose calculations high‐energy (average energy higher than 50 keV) photon‐emitting brachytherapy sources are presented, including physical characteristics specific 192 Ir, 137 Cs, 60 Co source models. Methods: This report has been prepared by High Energy Brachytherapy Source Dosimetry (HEBD) Working Group. includes considerations application TG‐43U1...
Further progress in the development of polymer gel dosimetry using MRI is reported, together with examples its application to verify treatment plans for stereotactic radiosurgery and high dose rate brachytherapy. The distribution image produced tissue‐equivalent by radiation‐induced polymerization, encoded spatial NMR transverse relaxation rates ( R 2 ) water protons gel, permanent. Maps are constructed from magnetic resonance imaging data serve as a template maps, which can be used complex...
Since publication of the 2004 update to American Association Physicists in Medicine (AAPM) Task Group No. 43 Report (TG‐43U1), several new low‐energy photon‐emitting brachytherapy sources have become available. Many these satisfied AAPM prerequisites for routine clinical use as January 10, 2005, and are posted on Joint AAPM/RPC Brachytherapy Seed Registry. Consequently, has prepared this supplement TG‐43 update. This paper presents AAPM‐approved consensus datasets sources, includes following...
This report addresses uncertainties pertaining to brachytherapy single-source dosimetry preceding clinical use. The International Organization for Standardization (ISO) Guide the Expression of Uncertainty in Measurement (GUM) and National Institute Standards Technology (NIST) Technical Note 1297 are taken as reference standards uncertainty formalism. Uncertainties using detectors measure or utilizing Monte Carlo methods estimate dose distributions provided with discussion components...
Purpose: Magnetic resonance imaging–guided radiotherapy (MRIgRT) provides superior soft-tissue contrast and real-time imaging compared with standard image-guided RT, which uses x-ray based imaging. Several groups are developing integrated MRIgRT machines. Reference dosimetry these new machines requires accounting for the effects of magnetic field on response ionization chambers used dose calibration. Here, authors propose a formalism reference devices. The also examined suitability %dd(10)x...
This study was performed to report and analyze the results of Radiological Physics Center's head neck intensity-modulated radiation therapy (IMRT) phantom irradiations done by institutions seeking be credentialed for participation in clinical trials using intensity modulated therapy.The anthropomorphic sent participate multi-institutional trials. The contained two planning target volume (PTV) structures an organ at risk (OAR). Thermoluminescent dosimeters (TLD) film were imbedded PTV....
PURPOSE To determine whether addition of external beam radiation therapy (EBRT) to brachytherapy (BT) (COMBO) compared with BT alone would improve 5-year freedom from progression (FFP) in intermediate-risk prostate cancer. METHODS Men cancer stage cT1c-T2bN0M0, Gleason Score (GS) 2-6 and prostate-specific antigen (PSA) 10-20 or GS 7, PSA < 10 were eligible. The COMBO arm was EBRT (45 Gy 25 fractions) seminal vesicles followed by boost (110 if 125-Iodine, 100 103-Pd). delivered only (145...
The measurement of complex dose distributions (those created by irradiation through multiple beams, sources, or source dwell positions) requires a dosimeter that can integrate the during complete treatment. Integrating devices generally are capable measuring only at point (ion chamber, diode, TLD) in plane (film). With increasing use conformal requiring shaped, noncoplanar there will be an increased requirement for record and display 3D distribution. required to confirm accuracy treatment...
Recently, a new model of radiochromic film has been developed for medical applications to provide higher sensitivity and better uniformity response than existing models (i.e., MD-55). Dosimetric characteristics including sensitivity, linearity, reproducibility, uniformity, dependence on energy time have studied experimentally. The the films were compared with those MD-55. For these investigations, two exposed ionizing radiation in dose range from 1-72 Gy, using gamma-rays 60Co teletherapy...