meetings
A dosimetric comparison between PET-based biology-guided and linac-based stereotactic body radiotherapy for bone and lung cases
Authors: Lisa Tran, BS; Daniel Pham, PhD, CMD, RT; Nataliya Kovalchuk, PhD, DABR
Poster Summary: Linac-based SBRT and PET-based SBRT plans were analyzed for dose to targets and OARs to determine whether the plan quality of the two techniques is comparable.
A novel SBRT treatment planning technique to focus high dose on gross disease
Authors: Kirk Luca, MS; Aparna Kesarwala, MD, PhD; Kathryn Benner, BS; Matthew Thomas, MS; Edward Schreibmann, PhD; Justin Roper, PhD
Poster Summary: A novel SBRT treatment planning technique to focus high dose on gross disease, potentially improving local control.
Application of a prostate bed and lymph node RapidPlan model to treatment planning of anal cancer patients: a dosimetric comparison and feasibility study?
Authors: Victoria Olsen, BS, CMD; Vishruta Dumane, PhD, DABR; Samuel Hammel, BS; Breanna Huang, BS; Maria Dimopoulos, PhD, MBA, RT(T)
Poster Summary: Authors apply an existing knowledge-based planning model to an alternative treatment site and patient orientation.?
Benefits of 3D Optimization on Palliative Spine Cases
Authors: Daisy Hong, BS; Nada Aimadeddine; Joshua Cherukara; Tyreke Jennis, RT; Jamie Baker, PhD, MEd; Chris Spicer, RT; Jordan Sutton, BS; Hamza Syed, MS, CMD
Poster Summary: Investigating the benefits of Raystation’s 3D optimization on palliative spine treatments.
Breast Planning Transition from Pinnacle to Eclipse: the B.I. Experience
Authors: Jennifer Nguyen, MS, CMD; Stefano Peca, PhD; Carrie Sampson, BS, CMD
Poster Summary: TPS transition from Pinnacle to Eclipse poses challenges yet offers advantages. Additional input from the whole RT team is warranted to ensure quality and safety.
Comparing Laterality-Specific and General Knowledge-Based Planning Models for Non-Small Cell Lung Cancer
Authors: Julia Seng, BS; Kirk Luca, MS; Justin Roper, PhD; Aparna Kesarwala, MD, PhD; Shadab Momin, PhD
Poster Summary: Investigating the dosimetric impact and plan quality of right-side and left-side RapidPlan models compared to a generalized model for non-small cell lung cancer.
Dosimetric advantages of hybrid treatment planning using the Ring Delivery System (RDS) for patients with positive nodes and left-sided breast cancer
Authors: Kamaldeep Gill, MS, CMD; Shyamali Saha, MSc
Poster Summary: The hybrid treatment planning offers better dosimetry for Breast and regional Nodes and has advantage of almost 50% less MUs, and low dose to heart and lung for Halcyon.
Dosimetric comparison of full bladder versus empty bladder in endometrial cases and how they correlate to overall bowel dose
Authors: Boaz Jeon, CMD; Michael Denis; Kamaldeep Gill, CMD; Jeffrey Antone, CMD; Yijian Cao, PhD; Beatrice Bloom, MD
Poster Summary: Treatments that are originally planned for full bladder but treated empty bladder (worst case scenario) shows significant increase in bowel bag dose.
Dosimetric evaluation of an efficient skin marker for marking scars, sarcomas and larger treatment areas during proton therapy
Authors: Thomas Houser, RT(T), CMD; Jenna Jatczak-Bolthouse, MS, CMD; Shifeng Chen, PhD, DABR; Matthew Ferris, MD; Byongyong Yi, PhD, DABR; Nrusingh Biswal, PhD, DABR
Poster Summary: Dosimetric evaluation of a new elevated, lower density, non-metallic marker for marking field borders, scars, sarcomas and larger treatment areas during proton planning. The dosimetric advantages are less dose perturbation and reduction of contour time.
Dosimetric evaluation of esophageal plans with or without avoidance sectors in the cervical, thoracic and abdominal regions?
Authors: Victoria Olsen, BS, CMD; Vishruta Dumane, PhD, DABR; Tyler Hwang, BS; Ting Jiang, BS; Regina Yu, BS; Maria Dimopoulos, PhD, MBA, RT(T);
Poster Summary: Authors compare the dosimetric parameters in esophageal planning using full arcs versus arcs with avoidance sectors.?
Evaluation of Lung Dose Reduction in VMAT Treatment Plans for Esophageal Cancer: A Comparative Study of Avoidance Strategies
Authors: Dong kyu Kim, BS; Dong Yeol Kwon, BS; Byoung Suk Park, MMP; Tae Yang Park, BS
Poster Summary: For esophageal cancer VMAT, adopting FA-AS is recommended due to its simplicity, significant reduction in total MU, and lung dose reduction comparable to FA-ST.
Evaluation of Single Plan Optimization of Bolus/Non-Bolus 3D Breast and Chest Wall Irradiation
Authors: Lauren Hindman, PSM; Matt Goss, MS, DABR
Poster Summary: Single plan solution of bolus and non-bolus planning without reoptimization is a viable option with minimal additional work from dosimetry and minor plan quality changes.
Explore the Feasibility of a Brachytherapy Alternative in the Form of Radiobiologically Optimized Stereotactic Body Radiotherapy for Locally Advanced Cervical Cancer
Authors: Pin Johnson, BS; Mahsa Dehghanpour, EdD, MS, CMD; Paul Mobit, Phd; William Duggar, Phd
Poster Summary: Pioneering research aims to investigate the possibility of radiobiological based SBRT techniques as an alternative for brachytherapy in the treatment of locally advanced cervical cancer.
Feasibility of Automated VMAT Plan Creation for GBM Treatment using RapidPlan
Authors: Janet Rodriguez; Garrett Baltz, MS, DABR; Steve Kirsner, MS, DABR
Poster Summary: Evaluation of dosimetric parameters of automated versus manual clinically approved plans to assess the feasibility of automated VMAT plan creation for GBM treatment using RapidPlan.
Feasibility of post-operative VMAT radiotherapy for circumferential neck keloids: Case Study
Authors: Quyen Duong, BS, CMD, RT(T); Minh Tam Truong, MD; Ariel Hirsch, MD; Kimberley Mak, MD, MPH; Siyoung Jang, PhD; Soyoung Lee, PhD; Harry Bohrs, BSc; Paul Nettey, CMD; Xin Zhang, PhD
Poster Summary: VMAT is a feasible and clinically acceptable treatment modality for complex circumferential neck keloids within 24 hours of surgery.
Hypofractionated Partial Breast Mixed Photon/Electron Technique – A Case Study
Author: Heather Parks, RT(R)(T), CMD
Poster Summary: This novel technique uses conformal photon and electron beam arrangement for hypofractioned partial breast. This approach can be effective or superior to other methods such as static field IMRT or VMAT for medially located, superficial targets, achieving dose conformality and OAR avoidance. It has been clinically demonstrated to a reliable and efficient 3D technique.
Insurance 3D Plan Comparisons using RayStation TPS Automation
Authors: Quyen Nguyen, BS; Meenu Mathew, MS; Lori Simmons, MS, CMD; Donald Hancock, BS, CMD; James Kanke, BS, CMD; Matthew Ning, MD, MPH; Peter Balter, MS, PhD, DABR
Poster Summary: Two automation techniques based on an IMRT plan were able to rapidly generate comparative 3D plans of equivalent quality to those produced by experienced dosimetrists.
?Integrating Knowledge-Based Planning and Noncoplanar Oblique VMAT Arcs: A Study of Dose to the Heart and Immune Cells in Thoracic Radiotherapy
Authors: Brennan Diedrich, BS; Justin Roper, PhD; Aparna Kesarwala, MD, PhD; Shadab Momin, PhD; Benjamin Hopkins, MD; Sibo Tian, MD; Kirk Luca, MS
Poster Summary: Integrating Noncoplanar Oblique Beam Arrangements with Knowledged-Based Planning for Reduced Effective Dose to Immune Cells.
Lung SBRT: Size-specific optimization of the dose gradient
Authors: Kathryn Benner, BS; Justin Roper, PhD; Aparna H. Kesarwala, MD, PhD, MD; Seth Fehrs, MS; Edward Schreibmann, PhD; Kirk Luca, MS
Poster Summary: Optimization settings with higher fall-off values enhance Conformity Index (CI50%) for smaller lung SBRT targets, balancing dose conformity with increased maximum dose and monitor units. Target size guides optimal fall-off selection, optimizing treatment quality.
Mitigation Strategies for Proton Lung Planning in the Presence of Pleural Effusion: A Case Study
Authors: Maggie Stauffer, MS, CMD; Sean Boyer, MS, DABR
Poster Summary: Proton case study in which a lung patient with pleural effusion was co-optimized on multiple image sets to simulate density decrease and improve plan robustness.
Reducing dermatitis in pencil beam scanning proton therapy (PBS) breast cancer patients by eliminating proton spots in the skin
Authors: Avril O'Ryan-Blair, BS Hons, DBM, CMD; Samantha Hedrick, PhD, DABR; Chester Ramsey, PhD, DABR, DABMP; Christopher Brown, BS, RT(R)(T), CMD; Alexander Ward, MS, RT(R)(T), CMD; Jeff Stamper, RT(R)(T), CMD
Poster Summary: Evaluating results of reduction in radiation dermatitis in hypofractionated pencil beam scanning proton therapy (PBS) breast patients by using a python script to remove spots out of skin
Reflexion Arc Therapy vs Varian VMAT
Authors: George Beninati, BS,RT(T), CMD; Jayesh Mistry, CMD; Charles Khuu, BS, CMD
Poster Summary: The purpose of this study was to perform a dosimetric comparison of SBRT Quality Metrics for lung plans calculated on Reflexion and Eclipse TPS utilizing full arc, partial arc, and non-coplanar techniques. Our finding showed that this new technology will
Retrospective Dose Reduction Analysis Comparing Treatment Plans Using Forced Hounsfield Units (FHU) & Non-Forced Hounsfield Units (N-FHU) for Prostate SBRT Patients with Bilateral Hip Prosthetics
Authors: Mitchell Tulchinsky, BS, CMD; Jeffrey Antone, CMD; Jameson Baker, PHD; Cynthia Polvorosa, MS
Poster Summary: A review of Bilateral Hip Prosthetics in Prostate SBRT patients with varying Hounsfield Units and LINACs.
The Correlation of Modulation, QA Pass Rate and Delivery Time for SBRT Treatments, Dosimetry and Physics Perspectives
Authors: Ryan Turner, MS; Matt Goss, MS, DABR; Danielle Waters, RT(T), CMD
Poster Summary: Historical predictors for SBRT QA pass rates are shown to have minimal correlation. Our study reinforces the importance of IMRT QA.
The impact of fluorine-18-fluoroethyltyrosine positron emission tomography scan timing on radiotherapy planning in newly diagnosed patients with glioblastoma: A Planning Study
Authors: John Ryan, MSc (MI), HBSc (RT)
Poster Summary: Learn about the emerging role of functional image-guided radiotherapy and some tricks for planning and volume studies.
The Utility of ROILS “Case Study” Reports: A “Quick” Reading Guide
Authors: Brandon Chykirda, BS; Marissa J. Vaccarelli, MS, DABR
Poster Summary: We identified common themes among the 18 ROILS cases published by ASTRO and created a “quick” reading guide.
TPS Accuracy at 1 meter Extended-Distance for a Novel TBI Technique
Authors: Shealynn Burgess; David Delaney; Stefano Peca, PhD;
Poster Summary: Testing the accuracy of Eclipse TPS at extended distance, approximately 1 meter below isocenter to develop a novel total body irradiation technique.
Utilizing a 3D printed nylon filament support device for enhanced radiation therapy clamshell set-up: a pilot project
Authors: Anthony Machuca, BS, CMD; Xuantong Zhang, BS, CMD; Michael Lovelock, PhD, FAAPM; Oscar Padilla, MD; Maria Dimopoulos, PhD, MBA, RT(T); Clodagh Starrs, MSc, PgC, RT(T)
Poster Summary: Demonstrate an innovative solution to support testicular shielding.