Authors: Chloe Doen Kim, Patricia E. Lindsay, Bern Norrlinger, Jan P. Seuntjens
Affiliation: Princess Margaret Cancer Centre & University of Toronto, Queen's University, Princess Margaret Cancer Centre
Abstract Preview: Purpose: To propose a method to check the consistency of VMAT delivery on linear accelerator (LINAC) with a commercial three-dimensional array device. The method is insensitive to the correction facto...
Authors: Julien Bancheri, Jan P. Seuntjens
Affiliation: Medical Biophysics, University of Toronto, Princess Margaret Cancer Centre & University of Toronto
Abstract Preview: Purpose: To obtain an analytical expression for the charge collection efficiency of parallel-plate ionization chambers in high dose-per-pulse (DPP) beams that takes into account the square pulse time ...
Authors: Stephen D. Davis, Alonso N. Gutierrez, Noah S. Kalman, Yongsook C. Lee, Michael Leyva, Alejandro Rene Llanes Lopez, Carlos M. Rivera, Ranjini P. Tolakanahalli
Affiliation: Miami Cancer Institute, Baptist Health South Florida, Miami Cancer Institute, Miami Cancer Institute, Baptist Health
Abstract Preview: Purpose: Accurate treatment time calculation is a critical component of superficial radiotherapy (SRT), particularly for the SRT-100 Vision, where dose delivery depends on applicator geometry, treatme...
Authors: Anna Becker, Tomislav Bokulic, Mauro Carrara, Krzysztof Chelminski, Larry A. DeWerd, Alexis Dimitriadis, Benjamin Kellogg, Malcolm R. McEwen, Zakithi L.M Msimang, Mark J. Rivard, Thorsten Sander, Thorsten Schneider, Jamema Swamidas, Egor Titovich, Paula Toroi, Carlos E. de Almeida, Jacco de Pooter, Liset de la Fuente Rosales, Deborah G. van der Merwe
Affiliation: Radiation and Nuclear Safety Authority, University of Zagreb, National Physical Laboratory, IAEA, Department of Medical Physics, School of Medicine and Public Health, University of Wisconsin - Madison, Rio de Janeiro State University, Dosimetry Laboratory, Dosimetry and Medical Radiation Physics Section, Division of Human Health, International Atomic Energy Agency, Physikalisch-Technische Bundesanstalt, National Metrology Institute, University of the Witwatersrand, Dosimetry and Medical Radiation Physics Section, Division of Human Health, International Atomic Energy Agency, National Research Council, Warren Alpert Medical School of Brown University
Abstract Preview: Purpose: The recently published IAEA-TRS-492 international code of practice (CoP) aims at improving traceability, accuracy, and consistency in Brachytherapy Dosimetry. To assess current approaches to ...
Authors: Brett G Erickson, Joseph P. Kowalski, Xinyi Li, Qiuwen Wu, Sua Yoo
Affiliation: Duke University, Mayo Clinic - Department of Radiation Oncology, Duke University Medical Center
Abstract Preview: Purpose: Characterization and commissioning of the BeO-based myOSLchip system was performed (per TG191) to assess its feasibility as a full replacement for the recalled Landauer aluminum oxide OSL in ...
Authors: Amar K. Basavatia, Lee C. Goddard, Rachel Grimm, Wolfgang A. Tomé
Affiliation: Montefiore Medical Center
Abstract Preview: Purpose: To characterize the “MyOSL Chip” OSLD system for clinical use and compare the response of multiple readers to allow for utilization in a multi-clinic environment.
Methods: Dose calibration...
Authors: David J. Carlson, Yiu-Hsin Chang, Huixiao Chen, Zhe (Jay) Chen, Blake Gaderlund, Ray Yang
Affiliation: RefleXion Medical, Department of Therapeutic Radiology, Yale University School of Medicine
Abstract Preview: Purpose: To address the root cause of dosimetric discrepancy for small central targets (<2cm) especially sensitive to geometric alignment of beamlets, by modeling higher-order oscillations of the coll...
Authors: Michael Evan Chaga, Timothy Chen, Darra M. Conti, Shabbar Danish, Jing Feng, Wenzheng Feng, Joseph Hanley, Tingyu Wang
Affiliation: Hackensack Meridian Health, Jersey Shore University Medical Center
Abstract Preview: Purpose: ZapMU is the first independent monitor unit check software freely available supporting ZAP-X. In this study, the clinical experience with ZapMU for independent second check of dose calculatio...
Authors: Gueorgui Gueorguiev, Katia Sergieva, Filip Simeonov, Tsvetelina Todorova, Bozhidar Vladimirov
Affiliation: National Centre of Radiobiology and Radiation Protection, Queen Giovanna University Hospital
Abstract Preview: Purpose: Dosimetry audit is an essential tool enhancing confidence in the accuracy of treatment delivery and in prevention of radiation treatment incidents. Current work depicts how novel nationwide r...
Authors: Baozhu Lu, Timothy C. Zhu, Yifeng Zhu
Affiliation: University of Pennsylvania
Abstract Preview: Purpose: Cherenkov intensity can be quantitatively correlated to surface dose but need certain corrections for accurate dose measurements. This study aims to investigate the impact of incident beam an...
Authors: Min Cheol Han, Chae-Seon Hong, Changhwan Kim, Dong Wook Kim, Hojae Kim, Hojin Kim, Jin Sung Kim, HO Lee, Kwangwoo Park, Ye-In Park, Junyoung Son
Affiliation: Department of Radiation Oncology, Yonsei Cancer Center, Heavy Ion Therapy Research Institute, Yonsei University College of Medicine, Department of Radiation Oncology, Yongin Severance Hospital, Yonsei University College of Medicine
Abstract Preview: Purpose: Overresponse in surface in-vivo dosimetry using optically stimulated luminescence dosimeter (OSLD) depends on the beam incidence angle. This study aimed to investigate correction factors to d...
Authors: Jacob Gooslin, Ellis Lee Johnson, Damodar Pokhrel
Affiliation: University of Kentucky, Department of Radiation Medicine, University of Kentucky, University of Kentucky, Radiation Medicine
Abstract Preview: Purpose: HyperArc radiosurgery permits treatment of multiple brain lesions using a single-isocenter improving treatment planning efficiency and workflow. A key stereotactic planning aspect is an indep...
Authors: Jared Baggett, Wesley E. Bolch, Lukas M. Carter, Laura Dinwiddie, Benjamin Taylor Heggie, Adam Leon Kesner, Juan Camilo Ocampo Ramos, Graham Joseph Stoddard
Affiliation: Department of Medical Physics, Memorial Sloan Kettering Cancer Center, University of Florida, MD Anderson
Abstract Preview: Purpose: The objective of this study is to develop a physical phantom to quantify tube current modulation (TCM) and assess the limitations of a TCM model used in Monte Carlo patient CT organ dose esti...
Authors: Ruirui Dong, Gernot Echner, Peter Haering, Clarence King, Carlos Murillo, Gavin Poludniowski, Nicholas Sammut, Joao Seco, Steffen Seeber, Maria Francesca Spadea, Elpida Theodoridou
Affiliation: KIT, Department of Physics and Astronomy, Heidelberg University, Karolinska Institutet, DKFZ, University of Malta
Abstract Preview: Purpose:
The goal is to develop the first benchtop X-ray FLASH system based on a conventional small animal irradiator. The small animal irradiator will be modeled using a Monte Carlo toolkit for bo...
Authors: Indra J. Das, Ahtesham Ullah Khan, Andrew J. White
Affiliation: Department of Medical Physics, School of Medicine and Public Health, University of Wisconsin - Madison, Northwestern Memorial Hospital, Northwestern University Feinberg School of Medicine
Abstract Preview: Purpose: Small field dosimetry presents challenges due to lateral disequilibrium and the selection of suitable detectors. Volume averaging and density corrections hamper accurate profile measurements....
Authors: Arjit K. Baghwala, Devin J. Olek, Parth K. Patel, Ramiro Pino, Adam Yanez
Affiliation: Houston Methodist Hospital, Kaiser Permanente
Abstract Preview: Purpose: The Halcyon beam model in Eclipse is immutable and only includes output factors (OF) for fields down to 1x1 cm2. The TPS must extrapolate OFs for smaller fields used in stereotactic (SRS/SBRT...
Authors: Milad BaradaranGhahfarokhi, Ashley Elizabeth Bonner, James R. Burns, Annie Cooney, George X. Ding, Kenneth L. Homann, Guozhen Luo
Affiliation: Corewell Health William Beaumont University Hospital, Vanderbilt University Medical Center
Abstract Preview: Purpose: The goal of this study was to evaluate the performance of a new plastic scintillating detector (PSD) system with 0.5×0.5 mm2 and 1.0×1.0 mm2 probes (referred to as Medscint0.5 and Medscint1.0...
Authors: Jeff Boob, Jaydev K. Dave, Tim Minch, Bhavyata Tanna
Affiliation: Dr. Ronald E. McNair Academic High School, Mayo Clinic, CurveBeam AI
Abstract Preview: Purpose: To compute effective doses associated with imaging of the extremities with a HiRise (CurveBeam AI, Hatfield, PA) cone-beam CBCT scanner specifically designed for weight-bearing imaging of the...
Authors: Mohamad Ahmad Alissa, Carson Brame, Damian Czarnecki, Olivier Evrard, Charbel A. Habib, Jeff Hildreth, Andy Murray, Andreas Schönfeld, Ann-Britt Schönfeld, David Towle, Gerd Wessing
Affiliation: CDT-West - Centrum für Diagnostik und Therapie, Radiologie Vechta, Technische Hochschule Mittelhessen, MyMichigan Health, Sun Nuclear Corp., Mirion Technologies
Abstract Preview: Purpose: To characterize field output correction factors of novel shielded and unshielded silicon diode detectors.
Methods: Novel shielded and unshielded Silicon Diode Detectors (SDD) were characte...
Authors: Matthew R. Hoerner, Maryam Naseri, Mena Shenouda
Affiliation: Yale University School of Medicine, Yale University
Abstract Preview: Purpose:
Historically film has been the gold standard receptor for measurements of x-ray tube focal spot size. Flat Panel Digital Radiography Detectors (FPDRDs) have lower spatial resolution compar...
Authors: Wesley S. Culberson, Larry A. DeWerd, Ahtesham Ullah Khan, Zachary James Welchel
Affiliation: Department of Medical Physics, School of Medicine and Public Health, University of Wisconsin - Madison, University of Wisconsin-Madison
Abstract Preview: Purpose: Flattening filter free (FFF) linac beams exhibit a centrally peaked beam profile due to the forward-directed bremsstrahlung production from MeV electrons, leading to volume averaging effects ...
Authors: Petr Bruza, Megan Clark, David J. Gladstone, Lesley A Jarvis, Allison Matous
Affiliation: Thayer School of Engineering, Dartmouth College, Dartmouth Cancer Center, Dartmouth Health
Abstract Preview: Purpose: Scintillation imaging has demonstrated unique advantages to existing clinical in vivo dosimetry (IVD) techniques by enabling full-field visualization, direct comparison to the treatment plan,...
Authors: Akbar Anvari, Carnell J. Hampton, Melanie R. Piantino, Kai Yang
Affiliation: Levine Cancer Institute, Atrium Health
Abstract Preview: Purpose: To evaluate the effectiveness of angular correction factor for output stability on Mevion S250i Hyper scanning machine, which allows user to apply correction factors for output at selected ga...
Authors: Ben Piacitelli, Celeste Winters
Affiliation: OHSU, Department of Diagnostic Radiology, Oregon Health & Science University
Abstract Preview: Purpose: To compare recovery coefficients measured with Lu-177 and Tc-99m with the goal of assessing accuracy of the Tc-99m surrogate method and comparing RC reproducibility between scanners of the sa...
Authors: Catherine Coolens, Robert K. Heaton, Lalageh Mirzakhanian, Tasnim Rahman, Jan P. Seuntjens
Affiliation: Princess Margaret Cancer Centre & University of Toronto, McGill University, Princess Margaret Cancer Centre, Princess Margaret Hospital, University of Toronto
Abstract Preview: Purpose: Commissioning of a Gamma Knife® (GK) (Elekta, Sweden) unit requires precise dosimetric reference measurements, particularly for small fields. The IAEA TRS-483/AAPM TG-155 code of practice (20...
Authors: Jeff Boob, Jaydev K. Dave, Tim Minch, Bhavyata Tanna
Affiliation: Dr. Ronald E. McNair Academic High School, Mayo Clinic, CurveBeam AI
Abstract Preview: Purpose: To estimate effective doses associated with different imaging protocols for hip imaging with a cone beam CT (CBCT) scanner specifically designed for weight-bearing acquisitions.
Methods: A...
Authors: Larry A. DeWerd, Ahtesham Ullah Khan
Affiliation: Department of Medical Physics, School of Medicine and Public Health, University of Wisconsin - Madison
Abstract Preview: Purpose: Total body irradiation (TBI) technique uses high energy photon beams with extended source-to-surface distances (SSDs) to irradiate the entire patient to prepare them for bone marrow or stem c...
Authors: Ozan Cem Guler, William Silva Mendes, Sangbo Oh, Cem Onal, Lei Ren, Apurva Singh, Phuoc Tran
Affiliation: University of Maryland School of Medicine, Baskent University Faculty of Medicine, Department of Radiation Oncology, Department of Radiation Oncology, University of Maryland School of Medicine
Abstract Preview: Purpose: To predict metastasis-free survival (MFS) for patients with prostate adenocarcinoma treated with androgen deprivation therapy and external radiotherapy using clinical factors and radiomics ex...
Authors: Baozhu Lu, Hongjing Sun, Timothy C. Zhu, Yifeng Zhu
Affiliation: University of Pennsylvania
Abstract Preview: Purpose: This study aims to validate the feasibility of using Cherenkov imaging for surface dose distribution measurement during Total Skin Electron Therapy (TSET) by developing a perspective-correcte...
Authors: Ross Bland, Zachary A. Christ, Sophy Mangana, Feba Mathew, Stephanie K. Phoenix, Joseph Salloum, Jason D. Stanford, William Zollinger
Affiliation: Forrest General Cancer Center, Northeast Louisiana Cancer Institute, Florida Atlantic University
Abstract Preview: Purpose: The objective of this paper is twofold: 1) to explore the efficacy of using referenced beam models supplied by the vendor (Brainlab) and 2) the efficacy of NIST traceable TLD for end-to-end v...
Authors: Brook Byrd, Lisha Chen, Michael LaRiviere, Baozhu Lu, John Plastaras, Brian W Pogue, Emily Xiong, Timothy C. Zhu, Yifeng Zhu
Affiliation: Department of Radiation Oncology, University of Pennsylvania, University of Pennsylvania, University of Wisconsin - Madison
Abstract Preview: Purpose: For total skin electron therapy (TSET), achieving optimal dose distribution depends on precise patient positioning, which is often influenced by daily variability. Cherenkov imaging offers a ...
Authors: Bryan Bednarz, Larry A. DeWerd, Sean Jollota, Ahtesham Ullah Khan, Ohyun Kwon, Jeff Radtke
Affiliation: Department of Medical Physics, School of Medicine and Public Health, University of Wisconsin - Madison
Abstract Preview: Purpose: The accurate quantification of absorbed dose is essential for alpha-emitting radionuclides used in radiopharmaceutical therapy (RPT). This study presents the first direct comparison of physic...
Authors: Dong Wook Kim, Hojae Kim, Hojin Kim, Jin Sung Kim, Tae Ho Kim, Sangmin Lee
Affiliation: Department of Radiation Oncology, Yonsei Cancer Center, Heavy Ion Therapy Research Institute, Yonsei University College of Medicine
Abstract Preview: Purpose: The CyberKnife system, designed for stereotactic radiosurgery (SRS) and stereotactic body radiotherapy (SBRT), considers SRS MapCHECK an effective tool for patient-specific QA (PSQA). This wo...