2869 entries curated across talks and posters.
Poster
GPD-T-334
Poster Program
Exhibit Hall | Poster Lounge
Jul 19 · 15:15
A Deep Learning Framework for Institution-Independent PTV Delineation In Glioblastoma Using Heterogeneous MRI Datasets
To develop a robust, institution-independent quality assurance model using heterogeneous datasets. By prioritizing generalizability over site-specific tuning, this model aims to predict and assist in the delineation of PTV contou...
Kyle O'Carroll, MS
Therapy Physics
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Poster
GPD-T-283
Poster Program
Exhibit Hall | Poster Lounge
Jul 19 · 15:15
A Dose Kernel Superposition Approach for 2D Lattice Dosimetry of Alpha Dart (224Ra) Sources
To achieve accurate dosimetric modeling of Alpha DaRT sources by accounting for the spatial superposition of dose contributions from multiple implanted sources arranged in a regular lattice geometry.
Jean-Francois Carrier
Therapy Physics
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Poster
GPD-D-15
Poster Program
Exhibit Hall | Poster Lounge
Jul 19 · 15:15
A Dose-Leveled Parametric NPS Modeling Library for Photon-Counting CT
Photon-counting CT (PCCT) denoising seeks to approximate high-dose image quality from lower-dose acquisitions. A key challenge for patient-specific denoising with precise control of denoising strength is the lack of an available...
Kuan Zhang
Diagnostic and Interventional Radiology Physics
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Poster
GPD-T-604
Poster Program
Exhibit Hall | Poster Lounge
Jul 19 · 15:15
A Dose-Painting Technique for Rotating Gamma SRS/SBRT Systems
Conventional sphere-packing techniques for Gamma Knife treatment plan optimization often produce less conformal dose distributions for non-spherical targets and are inefficient for dose delivery. This work investigates a dose-pai...
Chang Ming Charlie Ma, PhD
Therapy Physics
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Poster
GPD-T-462
Poster Program
Exhibit Hall | Poster Lounge
Jul 19 · 15:15
A Dosimetric Comparison of Intensity-Modulated Proton Therapy (IMPT), Cyberknife (CK), and Non-Coplanar Volumetric Modulated Arc Therapy (nCo-VMAT) for Orbital Lymphoma
To compare the differences among various treatment techniques in the treatment of orbital lymphoma, this study performed a dosimetric comparison among Intensity-Modulated Proton Therapy (IMPT), CyberKnife (CK), and non-coplanar V...
Zhitao Dai, PhD
Therapy Physics
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Poster
GPD-T-335
Poster Program
Exhibit Hall | Poster Lounge
Jul 19 · 15:15
A DSB-Weighted Modification to the Mkm for Carbon-Ion Rbe
In the microdosimetric kinetic model (MKM), the quadratic coefficient β is commonly assumed to be independent of linear energy transfer (LET). However, experimental data suggest that β decreases at very high LET, likely because t...
Ruofei Li
Therapy Physics
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Poster
GPD-D-74
Poster Program
Exhibit Hall | Poster Lounge
Jul 19 · 15:15
Advanced Mobile-Enabled CT Quality Control Server
To develop an automated CT quality control (QC) query system that retrieves, analyzes, and trends QC data and enables image artifact review across iPhone, iPad, and Computer platforms for 71 GE and Siemens CT scanners spanning nu...
Tinsu Pan, PhD
Diagnostic and Interventional Radiology Physics
0 people interested
Poster
GPD-T-587
Poster Program
Exhibit Hall | Poster Lounge
Jul 19 · 15:15
Advancing Multilingual Standards: French Translation of the TG‑263U1 Radiation Oncology Nomenclature
Increasing international collaboration in radiation oncology highlights the need for standardized nomenclature that is consistent across languages. The AAPM Task Group TG‑263U1 established French and Spanish language sub‑groups i...
Renee X. Larouche, MS
Therapy Physics
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Poster
GPD-T-1077
Poster Program
Exhibit Hall | Poster Lounge
Jul 19 · 15:15
Advancing Patient Accommodation on the Elekta Gamma Knife Esprit Radiosurgery Platform: Evaluation of a Clinically Improved Hdmm Camera-Arm Position
To characterize the angular dependence of the Elekta Gamma Knife Esprit High Definition Motion Management (HDMM) system and examine the feasibility of non-standard camera angles for the treatment of larger patients.
Ryan Bentley Mansfield
Therapy Physics
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Poster
GPD-T-586
Poster Program
Exhibit Hall | Poster Lounge
Jul 19 · 15:15
Adversarial Perturbation Analysis for Robustness Testing of Deep Learning–Based Radiation Therapy Dose Prediction
Deep learning–based three‑dimensional (3D) dose prediction models are increasingly becoming viable for radiotherapy workflows. However, their sensitivity to small variations in input data remains insufficiently characterized. Thi...
Rahim Chowdhury, MS
Therapy Physics
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Poster
GPD-T-77
Poster Program
Exhibit Hall | Poster Lounge
Jul 19 · 15:15
A Federated Learning Scheme Based on Deep Ensemble Learning for MRI-Based Multi-Institutional Study of Brain Metastasis Segmentation
To propose a federated learning (FL) framework incorporating a novel deep ensemble strategy for multi-institutional brain metastasis (BM) segmentation, improving performance in limited local datasets while preserving privacy by a...
Jingtong Zhao
Therapy Physics
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Poster
GPD-T-728
Poster Program
Exhibit Hall | Poster Lounge
Jul 19 · 15:15
A Flexible Rapidplan Model for Optimization of High-Grade Glioma Radiotherapy Plans with and without Hippocampal Sparing
Evidence from randomized trials demonstrates improved memory, cognition, and quality of life in patients whose hippocampi are spared during radiotherapy (RT) to the brain. We present a RapidPlan (RP) model for high-grade glioma R...
Samantha AM Lloyd, PhD
Therapy Physics
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Poster
GPD-T-76
Poster Program
Exhibit Hall | Poster Lounge
Jul 19 · 15:15
A Fluence Reconstruction Framework to Resolve Spectral Under-Response In Epid-Based SRS QA
To implement a correction methodology for amorphous silicon Electronic Portal Imaging Device (EPID) dosimetry that resolves systemic discrepancies due to beam hardening, aperture-specific response, and tongue-and-groove (TG) effe...
Jordi Saez
Therapy Physics
0 people interested
Poster
GPD-T-856
Poster Program
Exhibit Hall | Poster Lounge
Jul 19 · 15:15
A Framework for Assessing Plan Quality In Spatially Fractionated Radiation Therapy
Spatially fractionated radiation therapy (SFRT) aims to deliver high-dose peaks within tumors while maintaining low-dose valleys. However, commonly used peak-to-valley ratios or D5/D95 and D10/D90 metrics derived from gross tumor...
Salim Balik, PhD
Therapy Physics
0 people interested
Poster
GPD-D-192
Poster Program
Exhibit Hall | Poster Lounge
Jul 19 · 15:15
Age-Dependent Skeletal Tissue Models for the UF/MSK Newborn, Infant, and Toddler Phantom Series
To develop a slice-specific CT organ dose library using Monte Carlo radiation transport simulations on a set of newborn, infant, and toddler (NIT) computational phantoms containing newly developed age-specific skeletal tissue mod...
Stefan Wehmeier
Diagnostic and Interventional Radiology Physics
0 people interested
Poster
GPD-T-461
Poster Program
Exhibit Hall | Poster Lounge
Jul 19 · 15:15
A Generalizable Deep Learning Model for Real-Time CT Generation from a Single Projection for Lung Cancer Radiotherapy
Respiratory during lung cancer radiotherapy causes tumor and organ motion, increasing uncertainties of absorbed doses, while current image-guided methods cannot provide real-time volumetric CT during treatment. We proposed a gene...
Xiangyu Zhang, MM
Therapy Physics
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Poster
GPD-T-244
Poster Program
Exhibit Hall | Poster Lounge
Jul 19 · 15:15
Agentic Registration: When Natural Language Guidance Helps and When It Hurts
Current registration tools lack mechanisms for specifying clinical priorities. We developed a system accepting plain-text instructions (e.g., "prioritize tumor alignment for dose accumulation") and evaluated whether text guidance...
Rafe A. McBeth, PhD
Therapy Physics
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Poster
GPD-T-786
Poster Program
Exhibit Hall | Poster Lounge
Jul 19 · 15:15
A GPU-Based Multi-Criteria Optimization Algorithm for LDR Brachytherapy
In current prostate permanent implant (PPI) low-dose-rate (LDR) brachytherapy planning, algorithm-generated treatment plans are frequently sub-optimal, requiring time-consuming and user-dependent manual adjustments. This work aim...
Olivier Charette, BSc
Therapy Physics
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Poster
GPD-T-930
Poster Program
Exhibit Hall | Poster Lounge
Jul 19 · 15:15
Agreement between Surface Imaging and Cone-Beam CT for Daily Setup of Pelvic Radiotherapy Patients
To evaluate the clinical agreement between surface-guided radiotherapy (SGRT) and cone-beam CT (CBCT) for daily setup verification in pelvic radiotherapy patients.
Ajithkumar M, MS
Therapy Physics
0 people interested
Poster
GPD-T-603
Poster Program
Exhibit Hall | Poster Lounge
Jul 19 · 15:15
A Hybrid Density-Constrained Dynamic Framework for Five-Material Decomposition and Quantitative Physical Properties Via Multi-Energy Spectral Analysis In Photon-Counting CT
To develop and validate a novel hybrid framework for five-material decomposition (water, fat, bone, iodine, and lung) using three-energy Photon-Counting CT (PCCT). By integrating multi-energy spectral analysis with density-constr...
Masashi Yagi, PhD
Therapy Physics
0 people interested
Poster
GPD-T-140
Poster Program
Exhibit Hall | Poster Lounge
Jul 19 · 15:15
A Hybrid Method for Rapid, Automated Landmarking of Lung Vasculature In Free-Breathing CT
Dense lung vasculature landmarking is vital for assessing thoracic registration accuracy in treatment planning. We demonstrate an automated method for identifying vascular bifurcations in free-breathing CT images.
Peter Boyle, MS
Therapy Physics
0 people interested
Poster
GPD-T-602
Poster Program
Exhibit Hall | Poster Lounge
Jul 19 · 15:15
A Hybrid Prompt–Guided Multimodal Framework for Automatic Clinical Target Volume Delineation In Esophageal Cancer: A Multicenter Study
Accurate clinical target volume (CTV) delineation is essential for radiotherapy in esophageal cancer but remains highly subjective and variable due to its reliance on physician experience. Most automated approaches focus on gross...
Ziqi An
Therapy Physics
0 people interested
Poster
GPD-T-727
Poster Program
Exhibit Hall | Poster Lounge
Jul 19 · 15:15
A Hybrid Transmission–IMPT Planning Approach for Efficient Proton Treatment of Extremity and Metastatic Bone Targets
Proton transmission fields, treating through the target rather than stopping spots in the target, have a substantial but largely unrealized clinical potential, offering inherently robust delivery with minimal range uncertainty an...
Laura Buchanan
Therapy Physics
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Poster
GPD-T-601
Poster Program
Exhibit Hall | Poster Lounge
Jul 19 · 15:15
A Hybrid Vision Transformer-Based Framework for Multi-Endpoint Survival Prediction In Oropharyngeal Cancer
This study presents a hybrid framework combining Vision Transformer (ViT) and handcrafted radiomic features for oropharyngeal carcinoma (OPC), to enhance multi-endpoint survival prediction.
Mohammad Ullah Shemanto, MSc
Therapy Physics
0 people interested