meetings
A Dosimetric Comparison between Prostate Plans Optimized Manually and with a Knowledge-Based Planning Model
D. Granatowicz, MS, CMD; Y. Lei, PhD
Nebraska Medicine/University of Nebraska Medical Center, Omaha, NE
Poster Summary: Optimizing treatment plans using a knowledge-based planning model can provide lower OAR doses when compared to manually optimized treatment plans.
A Dosimetric Comparison of Treating High-Risk Prostate Cancer Using Sequential Versus Simultaneous Integrated Boost Planning Techniques in Photon and Proton Radiotherapy
K. Greco, BSc; H. Guerrero, BSc; C. McKenzie, BS, CMD, RT; M. Fagundes, MD; M. Rodrigues, MD; A. Garcia Serra, MD; A. Gutierrez, PhD, MBA
Department of Radiation Oncology, Miami Cancer Institute, Miami, FL
Poster Summary: Treating high-risk prostate cancer using sequential or simultaneous integrated boost planning techniques in photon and proton radiotherapy yield similar results and are both clinically acceptable.
A Multi-Institutional Dosimetric Evaluation of Proton Versus Photon Stereotactic Body Radiation Therapy for Hepatocellular Carcinoma
F. Khan, CMD; B. Nguyen, CMD; M. Perez, MD; S. Leuthold, CMD; N. Schreuder, MS; T. Hyun, CMD; T. Kim, CMD; S. Yoon, MD, PhD; C. McKenzie, BS, CMD, RT; A. Gutierrez, PhD; S. Apisarnthanarax, MD; M. Chuong, MD
Department of Radiation Oncology, Miami Cancer Institute, Miami, FL
Poster Summary: A multi-Institutional planning study of proton versus photon SBRT for HCC. Protons were able deliver higher doses without the need to dose de-escalate.
Achievable Salivary Gland Dose When Overlapping with the PTV in VMAT Plan Using gEUD Optimization for Head and Neck Cancer Patient
H. Zhang, PhD; Y. Cao, PhD; J. Antone, CMD; A. C. Riegal, PhD; M. Ghaly, MD; L. Potters, MD; A. Jamshidi, PhD
Department of Radiation Medicine, Northwell Health, Lake Success, NY
Poster Summary: A linear relationship of salivary gland dose achieved and its volume overlapped with PTV in VMAT plan using gEUD optimization for head-and-neck cancer.
Analysis of the Dosimetric Effect of Seed-Based Prostate Localisation on Pelvic Lymph Nodes when Treating High-Risk Prostate Cancer with VMAT
E. Miguel-Chumacero, BSc, MSc; B. Hunter, BSc; M. Leitch, BSc, MSc; S. Currie, BSc, MSc
Boston West of Scotland Cancer Centre, Radiotherapy Physics, NHS Greater Glasgow & Clyde, Glasgow, United Kingdom
Poster Summary: For high risk prostate cancer treatment, when daily position correction considers only the prostate, there is potential dose degradation to the pelvic lymph nodes.
Assessment of IMRT and VMAT Using RapidPlan Versus IMRT Using a Class Solution for the Treatment of Prostate Cancer in a 60Gy in 20 Fraction Dose Regimen
E. Miguel-Chumacero, BSc, MSc; B. Hunter, BSc; M. Anderson, BSc, MSc; S. Currie, BSc, MSc
Boston West of Scotland Cancer Centre, Radiotherapy Physics, NHS Greater Glasgow & Clyde, Glasgow, United Kingdom
Poster Summary: RapidPlan and VMAT for prostate plans increased the scope for organs at risk sparing but for some cases IMRT remains the best option.
Automation of Plan Documentation in Radiation Oncology: The Dosimetrist's Perspective
C. Amaloo, BS, CMD; L. Hayes, MS
Cone Health Cancer Center, Greensboro, NC
Poster Summary: Examination of the development and impact of an automated workflow for EMR treatment plan reporting in radiation oncology.
Comparing Deformable Registration and Rigid Registration for Re-Irradiation in Advance Stage Lung Cancer
X. Susainathan Selvanathan, BSc, Dip RP, CMD; T. Yiwen Chan, MSc; S. Junyan Cher MSc
Department of Radiation Oncology, National University Hospital, National Cancer Institute of Singapore (NCIS), Singapore
Poster Summary: A comparative study of lung dose parameters utilizing deformable and rigid registration in re-irradiation in advance stage lung cancer.
Comparison of Organ at Risk (OAR) Dose in Conventional vs. Hypofractionated Radiation Therapy to the Prostate and Proximal Seminal Vesicles Using Volumetric Modulated Arc Therapy (VMAT)
L. Nieto, MS; N. Kirby, PhD; T. Kyenzeh, MS, CMD; A. Kuchta, CMD; D. Cohen, MD
Mays Cancer Center, UT Health San Antonio MD Anderson Cancer Center, San Antonio, TX
Poster Summary: This study compared rectal toxicity for conventional versus hypofractionated treatment regimens for prostate and proximal seminal vesicle tumor volumes.
Comparison of Three Treatment Delivery Modalities for Spine Stereotactic Body Radiotherapy. Dosimetric Quantification for Target Coverage and Analysis of Critical Structure Doses
C. Wilgenbusch, MS, CMD; C. Kozarek, CMD
Department of Radiation Oncology, Miami Cancer Institute, Miami, FL
Poster Summary: Comparison of three treatment delivery modalities for spine stereotactic body radiotherapy. Dosimetric quantification of target coverage and analysis of Critical Structure Doses.
Development and Analysis of the Effectiveness of an Incident Learning System of Near-Misses to Improve Patient Safety and Quality Care in Radiation Oncology
N. Murphy, MS, CMD; P. Fisher, BLS, RT(R)(T); E. Weaver, RT(T); B. Zawislak, CMD; V. Sathiaseelan, PhD, DABR; J. Hayes, MD; I. Waris, RT(T); A. Stevenson, RN, BSN, CNRN; J. Smith
Northwestern Memorial Hospital, Department of Radiation Oncology
Poster Summary: Using an incident learning system to evaluate risk with respect to occurrence, severity, and detectability can be shown to be an effective process improvement tool.
Dosimetric Comparison of Halcyon and Truebeam VMAT Plans for H&N tumors
O. Apinorasethkul, MS, CMD; A. Tiwari, CMD; A. Alonso-Basanta, MD, PHD; R. Scheuermann, MMP
Department of Radiation Oncology, University of Pennsylvania, Philadelphia, PA
Poster Summary: To compare the dosimetric quality of VMAT treatment plans for bi-lateral H&N tumors between Varian Halcyon and Varian Truebeam (TB) treatment platforms.
Dosimetric VMAT Comparison using Rapid Arc and Tomotherapy for Parotid Gland Sparing
J. Mercado, CMD, RTT; R. Hernandez, CMD, RTT
Department of Radiation Oncology, Miami Cancer Institute, Miami, FL
Poster Summary: Dosimetric VMAT comparison using Rapid Arc and Tomotherapy for parotid gland sparing.
Dosimetry of Alternative Techniques for Accelerated Partial Breast Irradiation
H. Pham, BS, CMD; T. Nguyen, BS; C. Henson, MD; S. Ahmad, PhD, DABR; T. De La Fuente Herman, PhD, DABR
Department of Radiation Oncology, University of Oklahoma Health Sciences Center, Oklahoma City, OK
Poster Summary: Study investigation for APBI, using IMRT, non-coplanar IMRT, and VMAT; the best balance between heart and lung doses appears to be the IMRT approach.
Evaluating the Dosimetric Effect of Immobilization Devices in VMAT SBRT Treatments of the Lung: A Case Study
T. Costantino, MS, CMD, RT(T)
21st Century Oncology, South Florida Radiation Oncology, Wellington, FL
Poster Summary: Immobilization devices used in SBRT must be included in the “BODY” contour when using Varian Eclipse treatment planning system or reduced target coverage may occur.
Evaluation of Accuracy and Variability of Segmentation for a Number of Commercially Available Treatment Planning Systems
M. Yam, BS; C. McKenzie, BS, CMD, RT; G. Luciani, BS; DJ. Wieczorek, PhD; G. MacLennan, MBA, MSM, MS, CMD; J. Bennouna, MSc; V. Mishra, PhD; M. Fagundes, MD; M. Mehta, MD; A.N. Gutierrez, PhD, MBA
Department of Radiation Oncology, Miami Cancer Institute, Miami, FL
Poster Summary: The goal is to ascertain differences in object delineation among several treatment planning systems. Some objects show significant differences, (e.g. phantom cylinder). This may or may not be clinically significant.
Feasibility of Peri-Operative High-Dose Rate Brachytherapy for Heterotopic Ossification, in the Context of Battlefield Injuries
N. Saltmarsh, BS; K. Rasmussen, PhD; M. Fakhreddine, MD; N. Papanikolaou, PhD; D. Saenz, PhD; S. Stathakis, PhD; N. Kirby, PhD
University of Texas Health Science Center at San Antonio, San Antonio, TX
Poster Summary: A study of the feasibility for high-dose rate brachytherapy prophylaxis for heterotopic ossification resulting from battlefield related injuries using fixed shaped catheters.
Feasibility Study for Optimizer-Defined Beam Orientation in DIBH SBRT Planning
A. Livernois; M. Millar; T. Kyenzeh, MSc, CMD; N. Kirby, PhD; DN Stanley, PhD
Mays Cancer Center, UT Health San Antonio MD Anderson Cancer Center, San Antonio, TX
Poster Summary: This study explores the merit of an automatically defined, optimizer driven beam configuration methodology for the planning of deep inspiration breath hold SBRT lung patients.
How RO-ILS Helps Dosimetrists to Improve Patient Safety
K. Vaidya, MSc, CMD; R. Chan, MSc, CMD; Y. Cao, PhD, DABMP; K. Aronoff, RT(T), BS; L. Potters, MD, FACR, FASTRO
Department of Radiation Medicine, Northwell Health System, New Hyde Park, NY
Poster Summary: Radiation Oncology Incident Learning System (ROILS) helps to improve treatment planning workflow for Dosimertists, gives opportunity to avoid errors and enhance patient safety
Implementation of Object Spot Avoidance in Proton Pencil Beam Treatment on Whole Breast with Implant Metal Injector
P. Wang, PhD, DABR; K. Leach, BS, CMD
Texas Center for Proton Therapy, Irving, TX
Poster Summary: A planning technique for whole breast with an implant metal injector that uses a spot avoidance. This prevents proton spot placement in/through the metal injector while maintaining target coverage.
Improving Plan Quality Using “Effective” Leaf Width during Treatment Plan Optimization
M. Millar; S. Stathakis, PhD
Mays Cancer Center, UT Health San Antonio MD Anderson Cancer Center, San Antonio, TX
Poster Summary: This study aims to improve treatment plan quality by introducing a mid-treatment shift in a 2 arc plan.
IMRT Planning Parameter Optimization for Spine SRS
G. B. Ayala, BS; K. A. Doan, BS; H. J. Ko, BS, RT(T); P. K. Park, BA; E. D. Santiago, BS; S. J. Kuruvila, BS, CMD; T. M. Briere, PhD; Z. Wen, PhD
The University of Texas MD Anderson Cancer Center, Houston, TX
Poster Summary: Intensity-modulated radiation therapy (IMRT) parameter selection improves the balance among quality assurance passing rate, plan quality, and delivery time for spine stereotactic radiosurgery cases.
Integrating Single and Multi-Field Optimization for Proton IMPT Head and Neck Plans
K. Leach, BS, CMD
Texas Center for Proton Therapy, Irving, TX
Poster Summary: A treatment planning technique for head and neck cancers that uses both single and multi-field optimization to achieve ideal OAR sparing and maintain optimal plan robustness.
Increasing Delivery Efficiency by Reducing the Number of Arcs in VMAT Lung Cancer Treatment
G. Hoang, BS; R. James, BS; H. Young Lee, AAS, RTR; J. Nguyen; N. Rebueno, CMD; R. Sadagopan, MS
The University of Texas MD Anderson Cancer Center School of Health Professions, Houston, TX
Poster Summary: The use of two VMAT arcs resulted in a statistically significant reduction in treatment time and MUs compared to three arcs in lung cancer treatment.
Managing Motion in Lung Tumor Treatments through Robust Plan Optimization in Photo Beam Volumetric Arc Therapy
C. Young, BS
University Toledo Eleanor N. Dana Cancer Center, Toledo, OH and Grand Valley State University, Grand Rapids, MI
Poster Summary: The ability for RayStation Robust Optimization to improve target coverage in planned versus realistically delivered dose distributions is investigated as an alternative to respiratory management.
Obesity and Radiotherapy: ‘Fattening’ a Female Phantom
L. Garrett; N. Hardcastle; P. Lonski; T. Kron; R.D. Franich
School of Science, RMIT University, Melbourne, VIC, Australia, Peter MacCallum Cancer Centre, Melbourne, Australia
Poster Summary: A female anthropomorphic phantom has been modified with the addition of enlarging layers to better represent a wider range of body masses.
Plan IQ and Auto-Planning; A Study of Auto-Planning Objective Values with and without Plan IQ Data
C. Whinery; S. Stathakis PhD
Mays Cancer Center, UT Health San Antonio, MD Anderson Cancer Center, San Antonio, TX
Poster Summary: Using PlanIQ pre-planning assessment to determine Auto-Planning optimization dose objectives parameters.
Reducing Treatment Time and MU by Using Dynamic Conformal Arc Therapy for SBRT Breath-Hold Patients
T. Miller; S. Nunez-Albermann; B. Raju; A. Johnson; J. Sutton CMD; R. Sadogopan, MS
The University of Texas MD Anderson Cancer Center School of Health Professions, Houston, TX
Poster Summary: Our research is to discover if it is feasible to use dynamic conformal arc for SBRT instead of the standard VMAT.
Spatially Fractionated Radiotherapy (SFRT): Comparing Photon GRID with Proton Pencil Beam Scanning GRID
D. DeBlois BS, CMD; G. MacLennan, MBA, MSM, MS, CMD; J. Yu, PhD, DABR; D. Alvarez, MD; M. Hall, MD, MBA; M. Chuong, MD; M. Mehta, MD; A.N. Gutierrez, PhD, MBA
Department of Radiation Oncology, Miami Cancer Institute, Miami, FL
Poster Summary: A plan comparison study for spatially fractionated radiotherapy (SFRT) utilizing clinical photon GRID patients and replanning using proton pencil beam scanning.
Thyroid-Optimized and Thyroid-Sparing Radiotherapy in Oral Cavity and Oropharyngeal Carcinoma-Dosimetric Feasibility and Replanning Study
E. Healy, MD; W. Zoller, CMD; A. Ewing, CMD; J. Eckstein, BS; S. Ling, MD; J. Sipos, MD; V. Diavolitsis, MD; J. Wobb, MD; D. Mitchell, MD, PhD; J. Grecula, MD; E. Miller, MD, PhD; D. Blakaj, MD, PhD; A. Bhatt, MD.
The Ohio State University, Department of Radiation Oncology, Columbus, OH
Poster Summary: Mean thyroid dose is significantly reduced using either a thyroid-optimized or thyroid-sparing approach while maintaining adequate target coverage in N0-N2 oral cavity and oropharyngeal cancers.
Unveil the Hidden Differences between VMAT and IMRT
Y. Song, PhD; K. Dow, BS; X. Tang, PhD; M. Zhang, PhD; B. Mueller, MD; B. Mychalczak, MD
Memorial Sloan Kettering Cancer Center, New York, NY
Poster Summary: IMRT and VMAT are the two most dominant radiation treatment modalities in radiation oncology. In this digital poster, we discuss their major technical differences.
Varian Halcyon Dosimetric Comparison for Multi-Arc VMAT Prostate and Head and Neck Cancers
C. Riley; C. Cox; S. Graham; H. Havran; B. Kramer; T. Netherton, DMP; C. Peterson, PhD; T. Williamson, CMD; L. Court, PhD
The University of Texas MD Anderson Cancer Center School of Health Professions, Houston, TX
Poster Summary: The purpose of this study was to investigate how arc number affects VMAT plan quality using the Varian Halcyon for prostate and head and neck patients.
Volumetric Modulated Arc Therapy (VMAT) versus Intensity Modulated Radiation Therapy (IMRT) for Anal Carcinoma
H. Ortega, BSRT(T), CMD; K. Hibbitts, MS, DABR; B.Hao Chiang, MS; T. Herman, MD; S. Ahmad, PhD, DABR
Department of Radiation Oncology, University of Oklahoma Health Sciences Center, Oklahoma City, OK
Poster Summary: IMRT and VMAT plans for treating anal carcinoma can achieve similar PTV coverage and normal tissue sparing, but VMAT requires fewer MU and beam-on time.