meetings
A Comparison Between Single-Isocenter and Multi-Isocenter Plan Quality for Multi-Target Abdominal Radiation Treatments
Authors: Victoria Vira, Karen Bui, Caitlin Tran, Nhi Pham, Temiloluwa Oluwanifemi Esho, Rachael M. Martin-Paulpeter
Summary: Comparison of single-versus multi-isocenter SBRT VMAT plans for abdominal oligometastases showed both are clinically acceptable. Multi-isocenter offered slight improvements but greater complexity.
A Dosimetric Comparison of TrueBeam 6X and Halcyon 6X-FFF Energy in Prone Left Breast Radiation Therapy
Authors: Maritza Soto
Summary: Retrospective dosimetric comparison of prone whole breast 3D-conformal radiation plans on Halcyon with 6FFF versus re-planned TrueBeam with 6X, evaluating coverage, homogeneity, and OAR sparing.
A Quantitative Evaluation of Inter-Fraction Variability of Rectal Gas in Stereotactic Body Radiation Therapy Treatment of Localized Prostate Cancer
Authors: Shomanike Head, Hannah Lee, Karen Snyder
Summary: Investigation of 40Gy in 5fx SBRT prostate+SV treatment, and the impact of rectal gas on PTV and OAR dosimetric metrics for small and large rectums.
Absolute and Radiobiological Comparison of Collapsed Cone Convolution and Monte Carlo Dose Calculation Algorithms in Small Lung Tumors
Authors: Tammy Truong
Summary: This study compares the use of CCC and MC dose calculation algorithm for lung SBRT, finding no clinically significant differences between either algorithm.
Adaptive Planning Accelerated Partial Breast Irradiation (APBI) on Ethos using Eclipse Treatment Planning System as the Reference Plan
Authors: Robert Gleason, Rebecca Shulman
Summary: Tips for treatment planning adaptive partial breast irradiation on Ethos with Eclipse using Eclipse as the reference dose plan avoiding poor beam geometry with Ethos.
An Innovation in Radiation Oncology Clinical Workflow: The Development and Implementation of Daily Smart Rounds Review
Authors: Ruqin Zheng, Ray Chan, Jeffrey Antone
Summary: Smart Rounds is a great innovation in workflow that enhances patient safety and treatment quality by identifying and correcting issues prior to treatment.
Assessment of Pareto Optimal Projection Search Algorithm For Next Generation Radiotherapy Planning in Prostate Cancer Treatment
Authors: Khanh Pham, Kristen Vu, Robert Hammond, Zheng Shi, Ryan Schurr
Summary: The Pareto Optimal Projection Search Algorithm (POPSA) revolutionizes prostate VMAT planning by reducing active labor by 70%. By establishing a deterministic "quality floor," POPSA mathematically guarantees target saturation and superior OAR sparing while eliminating the catastrophic coverage failures often observed in commercial knowledge-based planning models.
Beam Geometry Optimization and Convergence Mode Evaluation for Knowledge-Based Planning of Hippocampal Avoidance Whole-Brain Radiotherapy: A Cross-Platform Study with Quantitative Scorecard Assessment
Authors: Anh Lam, Kirk Luca, Mandeep Kaur, Keyur D. Shah, Julia Seng, Kathryn Benner, Matthew Thomas, Hui-Kuo Shu, Xiaofeng Yang, Justin Roper, Jie Ding
Summary: Evaluating a four-arc hybrid geometry (4A-HG) and convergence modes to optimize hippocampal avoidance whole-brain radiotherapy (HA-WBRT) dosimetry using knowledge-based planning on Halcyon and Edge platforms.
Beyond the Whiteboard: An Interactive, Real-Time Dashboard for Operational Multidisciplinary Coordination
Authors: Matt Susen
Summary: Capsule is an in-house treatment management platform designed to make rad onc operations more visible, coordinated, and actionable in real time. The platform integrates ARIA data, calendars, scheduling resources, and selected manual inputs into a shared SQL-backed environment. Capsule demonstrates how a platform can improve communication and tracking in a large department.
Comparative Analysis of Setup Error Sensitivity in Thoracic SBRT Across CyberKnife, Halcyon, and VitalBeam
Authors: Elizabeth Brown
Summary: Small shifts, big impact: Setup error magnitude drives dosimetric degradation in thoracic SBRT, with consistent effects across CyberKnife, Halcyon, and VitalBeam.
Comparative Dosimetric and Efficiency Parameters Utilizing RapidPlan for Knowledge-Based Planning in Cervical, Thoracic, and Abdominal Esophageal Cancer
Authors: Emely De La Hoz, Kiko Zhou, Kevin Liu
Summary: This novel study shows RapidPlan enables efficient esophageal treatment planning enhancing organ sparing, preserving target coverage requiring 80% fewer structures and under 30 minutes.
Craniospinal Irradiation Volumetric Modulated Arc Therapy (VMAT) Planning: A Dosimetric Contrast Utilizing Anterior Avoidance Sectors
Authors: Ashleigh Sammataro
Summary: While both VMAT planning techniques achieved comparable target coverage, the AVD approach produced meaningful reductions in normal tissue integral dose and anterior OAR exposure compared to Full Arc approach, supporting its use as a preferred planning strategy for CSI.
Development and Implementation of an Auto Planning Module for Accelerated Partial Breast Irradiation (APBI) in the Eclipse Treatment Planning System
Authors: Noufal Manthala Padannayil, Maria F Bohorquez, Kelli M Cicchino, Shyam Pokharel, Ranjith Cholakkara, Nishan Shrestha, HemBahadur MoktanTamang, Suresh Rana
Summary: An automated ESAPI-based APBI planning module in Eclipse enhances efficiency, consistency, and standardization, delivering reliable, reproducible treatment plans with minimal user intervention.
Dosimetric Advantages of Daily Adaptive vs Non-Adaptive SBRT Plans of Various Abdominal Tumors on Varian ETHOS
Authors: Kamaldeep Gill, Shyamali Saha, Jeffrey Antone, Marissa Vaccarelli, Michael Trager, Baho Sidiqi
Summary: To evaluate dosimetric benefits of adaptive vs non-adaptive SBRT plans for patients with various abdominal tumors utilizing Eclipse v16.12 and Varian ETHOS planning system.
Dosimetric Comparison Between Geometric Centroid and Minimax Isocenter Placement in Multitarget HyperArc Fractionated Stereotactic Radiosurgery Plans
Authors: Matthew Gloudeman
Summary: Comparing HyperArc's default centroid against minimax isocenter placement for multi-met SRS shows that optimized, robust isocenter locations maintain equivalent plan quality, conformity, and brain sparing.
Dosimetric Comparison Between Rectal Sparing Partial Arc Versus Full Arc in Prostate VMAT Planning
Authors: Breanna Huang, Ting Jiang
Summary: This study dosimetrically compares the plan quality between rectal sparing partial arcs with full arcs for VMAT plans in prostate planning.
Dosimetric Impact of Aperture-Restricted VMAT on Heart Dose in Breast/CW Cancer Treated with Regional Nodal Irradiation
Authors: Anh Duong, Mandeep Kaur, Sunil Dutta, Tsegawbizu Gebru, Jacob Adams, Mark Cicchino, Reshma Jagsi, Sheela Hanasoge, Tosin Kayode, Eduard Schreibmann, Matthew Thomas, Xiaofeng Yang, Justin Roper, Kirk Luca, Jie Ding
Summary: Aperture-restricted geometry significantly improves cardiac and ipsilateral lung sparing while preserving target coverage across platforms; Extended convergence further enhances plan quality, supporting clinical translation for VMAT breast/CW with RNI.
Efficient Brain SRS Planning: Two-Arc HyperArc Strategy Maintains Dosimetric Quality While Reducing Treatment Time
Authors: Harshvardhan Kera, Camilo Correa-Alfonso, Kimberly Dempsey
Summary: Fewer HyperArc arcs in single brain metastasis SRS maintain dosimetric coverage while reducing beam-on time by up to 49%.
Evaluating Planning Strategies for Isotoxic Liver ART
Authors: An Nguyen, Panagiota Galanakou
Summary: Three planning strategies for adaptive radiotherapy were evaluated for isotoxic liver cases. The effect of PRVs, optimization structures and prioritization in adaptive radiotherapy were investigated.
Evaluating Rectal and Anal RapidPlan Models for Clinical Use: Can RapidPlan Generate a Clinically Acceptable Plan Under 3 Iterations?
Authors: Samina Islam, Fanny Pan, Vishruta Dumane, Maria Dimopoulos, Victoria Olsen
Summary: This novel efficiency study shows RapidPlan is able to achieve dosimetrically equivalent treatment plans as manual planning within 3 iterations and requiring 75% fewer structures.
Evaluating Robustness of LET-Optimized Proton Therapy Pelvic Plans
Authors: Savannah Demus, Ella Peterson, John Low, Christopher Rosas, Colton Schubert
Summary: Assessing robustness of linear energy transfer (LET)-optimized pencil beam scanning (PBS) proton therapy plans for whole pelvis irradiation treatment (WPRT) of anal cancer.
Impact of Anatomical Changes on Treatment Plan Robustness: A Comparative Study of Intensity Modulated Proton Therapy and Volumetric Modulated Arc Therapy in HN Cancer
Authors: Jennifer Croft, Xuanfeng Ding, Xiaoda Cong, Congxiao Chen
Summary: IMPT & VMAT remained clinically acceptable under anatomical changes, but VMAT preserved V100 coverage more consistently, while IMPT showed reduced robustness & greater sensitivity to daily anatomical variations.
Impact of Energy Layer Spacing on Treatment Delivery Time and Plan Quality in Intensity-Modulated Proton Therapy for Breath-Hold Cancer Patients
Authors: Ajay Banskota, Sina Mossahebi, ByongYong Yi
Summary: This study demonstrates that increasing the ELS-SF from 1.0 to 1.6 maintains comparable plan quality while reducing the number of energy layers by approximately 36%. As a result, average treatment delivery time is reduced by about 25 seconds. This approach significantly shortens beam delivery time in IMPT for BH treatments without compromising treatment plan quality.
Impact of Ultrasound-Guided Bladder Filling on Efficiency and Dosimetry in Adaptive SBRT for Gynecologic Cancers: An Analysis of HERA Trial Patients
Authors: Rachel Wolff, Rojine Ariani, Dishane Luximon, John Charters, Puja Venkat
Summary: Standardized ultrasound-guided bladder filling during adaptive gynecologic SBRT reduces volumetric variability and leads to superior dosimetry while minimizing total patient on-table times and improving throughput.
Impact of Wet vs. Dry Hair and Varying Hair Changes on Surface Dose and Setup Consistency in Whole Brain Radiation Therapy
Authors: Dyanira Salinas, Bethany Marshall
Summary: The purpose of this research was to quantify how varying hair conditions influence surface dose, mask fit, and immobilization accuracy during whole brain radiation therapy.
Influence of Lumpectomy Cavity Depth on 3D Arc-Based SIB Breast Radiotherapy
Authors: Emmett Dwyer
Summary: This study investigates how lumpectomy cavity depth affects plan outcomes for hypofractionated 3D arc-based simultaneous integrated boosts for whole-breast radiotherapy.
Knowledge-Based Planning for Ventricular Tachycardia SBRT
Authors: Tavia Keys, Kirk Luca, Vanessa Wildman, Jie Ding, Pretesh Patel, Aparna Kesarwala, Matthew Case, Trisha Jones, Braylon Madison, Alex Stanforth, Keyur D. Shah, Justin Roper, Eduard Schreibmann, Xiaofeng Yang, Shadab Momin
Summary: SBRT is an effective treatment for refractory ventricular tachycardia. A knowledge-based planning model was strategically developed to overcome specific limitations to generate optimal treatment plans.
Long-Term Outcomes of Re-Irradiation in Non-Hodgkin's Lymphoma: A Case of Anaplastic Large Cell Lymphoma
Authors: Clairene Chng, Ashley Ong, Zubin Master, Min Li Tey, Kheng Wei Yeoh
Summary: Early re-irradiation with conventional radiotherapy and systemic chemotherapy achieved durable local control, minimal toxicity and good quality of life in non-Hodgkin's lymphoma over long term follow up.
MIM Maestro vs. RADformation ClearCheck for Small Lesions Dosimetry Review
Authors: Hannah Nguyen, Jessica Leif, Stephen Kry
Summary: The use of MIM Maestro vs. RADformation ClearCheck system to review clinical trial SRS dosimetry plan with target volumes of less than or equal 0.5cc.
Normal Tissue Objective Versus Manual Optimization Rings for Multiple Brain Metastases Stereotactic Radiosurgery
Authors: Shelby David, Alyssa Capizzi
Summary: Dosimetric comparison of Eclipse Normal Tissue Objective and manual optimization rings in multiple brain metastases radiosurgery to assess plan quality and normal tissue sparing.
Optimizing Stereotactic Spinal Radiosurgery Planning with MR-Linac Treatment in Comparison to CT-Linac Treatments
Authors: Javier Cabrera, Alexis Sosa, Jon Ibarra, Kristine Raju, Hoang Mai Do, Lori Simmons, Travis C. Salzillo
Summary: This study compared Monaco MR-Linac and RayStation TrueBeam SSRS plans across nine indexes, finding RayStation superior in conformality while both maintained clinically acceptable coverage.
Patient-Specific PTVs Improve Bowel OAR Sparing and Safely Reduce PTV Volume for Whole Bladder Irradiation
Authors: Quade Zeedrich, Jenna Schulte, Sara Vay
Summary: Dosimetric comparison of large and small bowel sparing between patient-specific bladder PTVs from the first week of CBCTs versus a conventional population-based bladder PTV.
Preliminary Study for Clinical Feasibility of SBPT vs SBRT for Thoracic and Liver Disease Sites
Authors: Sasha Alonzo Grillet, Eman Hashem, Melissa Gloria Novas, Ayat Swaydan, Laura Velez, Jamie Baker, Paige Taylor, David Flint, Yuting Li
Summary: This study demonstrates that proton therapy for lung and liver tumors improves normal tissue sparing compared to conventional radiation while maintaining target coverage, although sensitive to setup uncertainties.
Pushing the Limits: Proton Spot Deletion in Prostate Nodal Planning
Authors: Christopher Brown, Avril O'Ryan
Summary: Proton spot deletion can impact dosimetric plan quality in prostate nodal treatments, influencing target coverage, dose heterogeneity, organ-at-risk sparing, and overall plan robustness.
Summary: Acuros XB demonstrated improved dosimetric accuracy over AAA, especially in closed jaw configurations, where both algorithms overestimated dose but AAA showed larger deviations.
The Emerging Role of the Imaging Specialist: A Workflow Model to Support Medical Dosimetrist
Authors: Brandi Carr, Kirk Luca, Rachel Wilson, Ebonee Daniels-Burbridge, Tosin Kayode, Matthew Thomas, Beth Ghavidel, Hania Al-Hallaq, Justin Roper, Jie Ding
Summary: Dedicated Imaging Specialists improve pre-planning workflow safety, consistency, and efficiency, allowing dosimetrists to focus on high-quality treatment planning, automation, and more timely patient care.
Transforming Plan Finalization Through Automated Error Identification and Team-Based Solutions
Authors: Sheri Fletcher
Summary: Automated chart-check tools enhance plan finalization by reducing preventable errors, improving workflow efficiency, strengthening quality assurance, and promoting safer consistent radiation therapy delivery across teams.
Treatment Plan LET Validation Using Measured Integral Depth Dose for Proton Therapy
Authors: Ajay Banskota, Nrusingh Biswal, ByongYong Yi
Summary: The method was used to successfully validate the treatment planning system calculated dose-averaged LET (LETd). This may be a potential tool to QA the LET doses on the organs at risks during proton therapy.
Visualization of Continuous Radiopaque Filament Marker within a Digitally Reconstructed Radiograph
Authors: Dominic Rafie, Frank Rafie, David Beyer
Summary: Using optimized imaging parameters, radiopaque filament markers can be clearly visualized in digitally reconstructed radiographs. This enables their effective use in patient setup for breast conserving radiotherapy.