A5081891037- Advanced Radiotherapy Techniques
- Radiation Therapy and Dosimetry
- Radiation Dose and Imaging
- Medical Imaging Techniques and Applications
- Nuclear Physics and Applications
- Boron Compounds in Chemistry
- Radiation Detection and Scintillator Technologies
- Advanced X-ray and CT Imaging
- Lung Cancer Diagnosis and Treatment
- Radiation Effects and Dosimetry
- Breast Cancer Treatment Studies
- Advances in Oncology and Radiotherapy
- Radiation Shielding Materials Analysis
- Digital Radiography and Breast Imaging
- Boron and Carbon Nanomaterials Research
- Radiopharmaceutical Chemistry and Applications
- Effects of Radiation Exposure
- Atomic and Subatomic Physics Research
- Lanthanide and Transition Metal Complexes
- Advanced X-ray Imaging Techniques
- Advanced MRI Techniques and Applications
- Salivary Gland Tumors Diagnosis and Treatment
- Head and Neck Cancer Studies
- Hepatocellular Carcinoma Treatment and Prognosis
- Prostate Cancer Treatment and Research
The Netherlands Cancer Institute
2014-2023
Dutch Cancer Society
2014
Oncode Institute
1990-2013
Champalimaud Foundation
2012
Maastro Clinic
2006-2009
Inholland University of Applied Sciences
2008
University Medical Center Utrecht
1998
Harvard University
1987-1989
Dana-Farber/Harvard Cancer Center
1989
This document is the report of a task group Radiation Therapy Committee AAPM and has been prepared primarily to advise hospital physicists involved in external beam treatment patients with pelvic malignancies who have high atomic number (Z) hip prostheses. The purpose make radiation oncology community aware problems arising from presence these devices beam, quantify dose perturbations they cause, and, finally, provide recommendations for planning delivery. Some data are also applicable...
The use of electronic portal imaging devices (EPIDs) is a promising method for the dosimetric verification external beam, megavoltage radiation therapy—both pretreatment and in vivo . In this study, previously developed EPID back‐projection algorithm was modified IMRT techniques applied to an amorphous silicon EPID. By using algorithm, two‐dimensional dose distributions inside phantom or patient are reconstructed from images. model requires primary component at position A parametrized...
The potential for detrimental incidents and the ever increasing complexity of patient treatments emphasize need accurate dosimetric verification in radiotherapy. For this reason, all curative are verified, either pretreatment or vivo , by electronic portal imaging device (EPID) dosimetry Radiation Oncology Department Netherlands Cancer Institute‐Antoni van Leeuwenhoek hospital, Amsterdam, Netherlands. Since clinical introduction method January 2005 until August 2009, treatment plans 4337...
The ‐evaluation method is a tool by which dose distributions can be compared in quantitative manner combining dose‐difference and distance‐to‐agreement criteria. Since its introduction, the evaluation has been used many studies on verge of becoming preferred distribution comparison method, particularly for intensity‐modulated radiation therapy (IMRT) verification. One major disadvantage, however, long computation time, especially applies to three‐dimensional (3D) distributions. We present...
Treatment plans are usually designed, optimized, and evaluated based on the total 3D dose distribution, motivating a verification. The purpose of this study was to develop 2D transmission‐dosimetry method using an electronic portal imaging device (EPID) into simple that provides information. In new method, is reconstructed within patient volume in multiple planes parallel EPID for each gantry angle. By summing grids all beams, distribution treatment fraction obtained. algorithm uses contours...
Abstract Purpose Electronic portal imaging devices (EPIDs) have been widely utilized for patient‐specific quality assurance (PSQA) and their use transit dosimetry applications is emerging. Yet there are no specific guidelines on the potential uses, limitations, correct utilization of EPIDs these purposes. The American Association Physicists in Medicine (AAPM) Task Group 307 (TG‐307) provides a comprehensive review physics, modeling, algorithms clinical experience with EPID‐based...
The purpose of this study was to investigate the dose–response characteristics, including ghosting effects, an amorphous silicon-based electronic portal imaging device under clinical conditions. EPID measurements were performed using one prototype and two commercial detectors on linear accelerators: with 4 6 MV other 8 18 x-ray beams. First, signal ionization chamber in a mini-phantom compared determine amount buildup required for dosimetry. Subsequently, characteristics studied as function...
Radiotherapy technology continues to advance and the expectation of improved outcomes requires greater accuracy in various radiotherapy steps. Different factors affect overall dose delivery. Institutional comprehensive quality assurance (QA) programs should ensure that uncertainties are maintained at acceptable levels. The International Atomic Energy Agency has recently developed a report summarizing achievable suggested action levels, for each step process. Overview report: seeks promote...
Publication of ICRU Reports 50 and 62 has highlighted the need to devise protocols for process drawing planning target volume (PTV) around clinical (CTV). The margin surrounding CTV should be wide enough account all geometric errors so that no part accumulates a dose less than, instance, 95% prescribed. One approach problem been draw delineated at treatment preparation stage which is sufficiently mean position will encompassed in specific percentage cases, example 90%. This accounts...