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Author profile
Sina Mossahebi, PhD
Department of Radiation Oncology, University of Maryland School of Medicine
Clinical Integration of a Nozzle-Mounted Quad-Camera Prompt Gamma Imaging for Proton Range Verification
To integrate the first nozzle-mounted, quad-camera prompt gamma imaging (PGI) system on a clinical proton therapy gantry and to evaluate its efficacy for proton range verification under realistic treatment delivery conditions.
Proffered Program · Therapy Physics
Beyond 2D Evaluation: MRI Polymer Gel–Based 3D DVH Verification for VMAT Lattice Radiotherapy
Lattice radiotherapy (LRT) produces steep vertex–valley gradients, making 2D gamma-based QA insufficient for clinically relevant 3D dose–volume endpoints. We propose an MRI polymer gel–based 3D DVH verification workflow for VMAT-LRT and assess feasibility and...
Poster Program · Therapy Physics
Feasibility of Single-Energy Proton Pencil Beam Scanning Using a Programmable Energy Modulation Filter
Proton pencil beam scanning (PBS) offers excellent dose conformity but remains limited by delivery inefficiency associated with energy layer switching time. A programmable energy modulation filter (PEMF) was developed to enable single-energy proton PBS delive...
Poster Program · Therapy Physics
Initial Evaluation of the Ravin CAM System for Identification of Proton-Induced Activation In a Clinical Proton Therapy Facility
Secondary radiation from proton therapy can induce activation in beamline components, range shifters, and phantoms/patients. Rapid identification and localization of activated regions are critical for radiation safety, compliance, and workflow efficiency. We...
Poster Program · Therapy Physics
Radiochromic Film Dosimetry for QA, In-Vivo Dosimetry, and Range Assessment In Pbs Proton Therapy
To commission and clinically implement a robust radiochromic film dosimetry workflow for PBS proton therapy, providing a practical solution for small-field patient-specific QA, in-vivo dose verification, and WET-based range assessment when dedicated in-vivo a...
Poster Program · Therapy Physics
Risk Informed Workflow and Disease Specific Milestones Ensure Safe Patient Transfer and Treatment between Proton Therapy Centers
With the number of proton centers increasing, each facing intermittent downtime or need for renovations. Developing optimal approaches to maintain uninterrupted treatment is essential to preserve clinical outcomes. This study outlines key risk factors, workfl...
Poster Program · Therapy Physics
BLUE RIBBON POSTER THERAPY: Clinical Dosimetric Impact of Dual-Layer Dect–Derived SPR for Proton Therapy Planning
To assess dual-layer DECT-derived SPR images for proton therapy by identifying tissue-specific deviations versus SECT, validating discrepancies using measured SPR in biological tissues, and evaluating dosimetric impact of DECT-based robust optimization.
Poster Program · Therapy Physics
Vertex-Wise 3D QA for Lattice Radiotherapy Using Segmented Isodose Structure Analysis
This study proposes a vertex-wise Isodose Structure (IS)-based framework to evaluate the 3D geometric accuracy of Lattice Radiotherapy (LRT) dose distributions by decoupling geometric misalignment from dose-dependent volumetric distortion, enabling vertex-spe...
Proffered Program · Therapy Physics