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Results for "source particle": 15 found

An Experimentally Derived Microscale Blood and Lymphatic Vasculature Model for Applications to Radiopharmaceutical Dosimetry

Authors: Peter Balogh, Wesley E. Bolch, Mir Md Nasim Hossain, Nien-Wen Hu, Walter Murfee, Wyatt Smither, Julia D. Withrow

Affiliation: New Jersey Institute of Technology, University of Florida

Abstract Preview: Purpose: To develop 3D computational, tissue-representative models incorporating physiologically relevant microvascular network patterns for calculating local alpha particle and electron dosimetry eff...

BEST IN PHYSICS THERAPY: Immunomodulatory Effects of Selective PARP1 Inhibition in Combination with Photon and Alpha Particle Therapy in Immunologically Cold Breast Cancer

Authors: Scott James Bright, Vered Domankevich-Bachar, Mandira Manandhar, Poliana Marinello, Yogesh Rai, Marco Freitas Reis, Alexandre Rubinstein, Gabriel O. Sawakuchi, Ronen Segal, Walison Augusto Silva Brito, Mark Wasley, Amy Wu

Affiliation: MD Anderson Cancer Center, Alpha Tau Medical Ltd, Alpha Tau Medical LTD, Department of Radiation Physics, The University of Texas MD Anderson Cancer Center

Abstract Preview: Purpose: Immunologically cold breast cancers are aggressive and difficult to treat due to their lack of immune cell infiltration. The combination of high-LET radiation with DNA repair inhibitors offer...

Computational Prototype Single-Channel Vaginal Cylinder with Integrated Filter to Address Dose Uniformity in High-Dose-Rate Brachytherapy for Endometrial Cancer

Authors: Brett Bocian, Patrick James Jensen, Luis Augusto Perles, Christopher J. Tien

Affiliation: Yale University School of Medicine, University of Miami, The University of Texas MD Anderson Cancer Center, UT MD Anderson Cancer Center

Abstract Preview: Purpose: Guidelines for dose prescriptions in endometrial cancer are based upon depth from the cylinder, traditionally 5 mm or 0 mm (i.e., surface). There are no current single-channel vaginal cylinde...

Computed Tomography Organ Dose Library Derived from Newly Developed Newborn-Infant-Toddler Computational Phantoms

Authors: Jared Baggett, Wesley E. Bolch, Lukas M. Carter, Robert Joseph Dawson, Laura Dinwiddie, Adam Leon Kesner, Cameron B. Kofler, Juan Camilo Ocampo Ramos, Yitian Wang, Stefan Wehmeier

Affiliation: University of Chicago, Department of Medical Physics, Memorial Sloan Kettering Cancer Center, University of Florida, MD Anderson

Abstract Preview: Purpose: To develop a slice-specific computed tomography (CT) organ dose library using Monte Carlo radiation transport simulations on a newly created set of newborn, infant, and toddler computational ...

Creation of Proton Minibeams in a Pbs Nozzle from Low Emittance Source Beams

Authors: Seung Yeon Kim, Grant A. McAuley, Ju A Park, Jerry D Slater

Affiliation: Loma Linda University

Abstract Preview: Purpose: The production of proton minibeams in standard PBS nozzles is challenging due to the effects of finite source beam divergence and multiple Coulomb scattering. Herein we investigate the use of...

Efficient Monte Carlo Simulation of Radiation-Induced Double Strand Break Production and Repair Kinetics

Authors: Zakaria Aboulbanine, Greeshma A. Agasthya, Paul Inman, Anuj J. Kapadia, Anthony Hong Cheol Lim, Jayasai Ram Rajagopal, Chris C. Wang

Affiliation: Oak Ridge National Laboratory, Georgia Institute of Technology

Abstract Preview: Purpose: Radiobiological simulation via TOPAS-nBio requires significant computational resources and time to provide meaningful results. This study aims to decrease simulation time and computational re...

Energy Dependency of Biological Effects from Radiation Scattering Around Medical Implants in Particle Therapy

Authors: John Ford, Yu Fujiwara, Isao Murata, Zavier Ndum Ndum

Affiliation: Osaka University, Texas A&M University

Abstract Preview: Purpose: This study investigates how particle energy affects radiation quality and biological effectiveness with the inclusion of medical implants. Our research group used microdosimetric analysis to ...

Feasibility Study of Using HDR1000+ Well-Type Ionization Chambers for Solution Based 90y Measurements

Authors: Denis Bergeron, Larry A. DeWerd, Sean Jollota, Peyton Alexandra Lalain, Likhitha Polepalli

Affiliation: Department of Medical Physics, School of Medicine and Public Health, University of Wisconsin - Madison, National Institute of Standards and Technology

Abstract Preview: Purpose: 90Y is a challenging radionuclide to measure because it is a pure beta-emitter and is typically quantified using a radionuclide calibrator. These devices, such as the Capintec model used in t...

Impact of Physics Modeling on Monte Carlo Normal Tissue Dose Reconstructions for Passive Scattering Proton Therapy Patients

Authors: Caroline Esposito, Keith T Griffin, Jae Won Jung, Choonik Lee, Choonsik Lee, Matthew Mille, Harald Paganetti, Sergio Morato Rafet, Jan PO Schuemann, Jungwook Shin, Torunn I Yock

Affiliation: East Carolina University, University of Michigan, Massachusetts General Hospital, National Cancer Institute, Division of Cancer Epidemiology and Genetics, National Cancer Institute, Massachusetts General Hospital and Harvard Medical School

Abstract Preview: Purpose: The National Cancer Instituteโ€™s Pediatric Proton and Photon Therapy Comparison Cohort aims to collect and analyze data from cancer centers across the United States and Canada to quantify diff...

Intra-Organ Blood Vessel Mapping in Mice for Improved Pre-Clinical Radiation Dosimetry

Authors: Daylin Barroso, Chris Beekman, Wesley E. Bolch, Natalia Estefania Carrasco-Rojas, Robert Joseph Dawson, Walter Murfee, Harald Paganetti, Andrew Robert Sforza, Julia D. Withrow

Affiliation: Massachusetts General Hospital - Harvard Medical School, Massachusetts General Hospital, University of Florida

Abstract Preview: Purpose: To develop methods for quantifying the interaction of radiation with blood in the mouse whole body (MOBY) phantom for dosimetric applications. The most important of these are modeling the dis...

Modeling Alpha-Particle Dose from Diffusing Alpha-Emitters Radiation Therapy in Tissue with Inhomogeneous Diffusion

Authors: Lior Arazi, Gil'ad N. Cohen, Antonio L. Damato, Irene P. Zhang

Affiliation: Unit of Nuclear Engineering, Faculty of Engineering Sciences, Ben-Gurion University of the Negev, NYU Grossman School of Medicine, Memorial Sloan Kettering Cancer Center

Abstract Preview: Purpose: Diffusing alpha-emitters Radiation Therapy (โ€œAlpha DaRTโ€) is a promising new radiation therapy modality for treating bulky tumors. The dose delivered by Alpha-DaRT sources is dependent on the...

Organ Dose Estimation from Successive CBCT Imaging for Patients Undergoing Radiation Therapy for Prostate Cancer

Authors: Panagiotis Iliopoulos, Marios Myronakis, Kyriaki Theodorou

Affiliation: Medical Physics Department, Medical School, University of Thessaly

Abstract Preview: Purpose: To estimate individualized absorbed dose at Organs at Risk (OARs) from kV Cone Beam CT (CBCT) imaging in the pelvic area, prior radiotherapy, and assess excess risk for secondary malignancies...

Portpy: An Open-Source Python Package to Accelerate Research in Radiotherapy Treatment Planning Optimization

Authors: Qijie Huang, Gourav Jhanwar, Saad Nadeem, Vicki Trier Taasti, Mojtaba Tefagh, Seppo Tuomaala, Masoud Zarepisheh

Affiliation: Varian Medical Systems Inc, Department of Clinical Medicine - Danish Center for Particle Therapy, Aarhus University Hospital, Memorial Sloan Kettering Cancer Center, The University of Edinburgh

Abstract Preview: Purpose:
We have developed PortPy (Planning and Optimization for Radiation Therapy in Python), a first-of-its-kind open-source package designed to accelerate research and development in radiotherap...

The Topas Monte Carlo Framework โ€“ Status and Outlook after 15 Years of Development

Authors: Alejandro Bertolet, Jorge Naoki Dominguez Kondo, Bruce A. Faddegon, Thongchai Masilela, Isaac Meyer, Victor V. Onecha, Harald Paganetti, Jose A. Ramos-Mendez, Jan PO Schuemann, Wook-Geun Shin

Affiliation: University of California San Francisco, Massachusetts General Hospital and Harvard Medical School, Massachusetts General Hospital

Abstract Preview: Purpose: To present the results of 15 years of developments of the TOPAS TOol for PArticle Simulation framework, and to highlight recent and new developments.

Methods: Fundamental understanding...

Using a Generative Adversarial Network (GAN) for Source Particle Generation in Monte Carlo Radiation Therapy Simulations

Authors: Jiankui Yuan, Dandan Zheng, Tingliang Zhuang

Affiliation: Medical Artificial Intelligence and Automation (MAIA) Laboratory, Department of Radiation Oncology, UT Southwestern Medical Center, University of Rochester, Varian Medical Systems, Advanced Oncology Solutions

Abstract Preview: Purpose: In Monte Carlo (MC) radiation therapy dose calculations, latent variance exists when directly applying phase-space files (PSF) with a finite number of source particles, while the latter is pr...