Verification of source dwell positions in HDR ring applicators is critical due to variability introduced by source wire slack. Conventional autoradiographic film methods are often limited by setup uncertainties—such as manual stem marking—and typically requir...
Author profile
Choonik Lee, PhD
University of Michigan
A Custom 3D Printed Film Jig for Robust Autoradiography of the GYN Ring Applicator
Poster Program · Therapy Physics
A Web-Based Semi-Automated Film Analysis Tool for Repeated Verification of Varian GYN Ring Applicator Dwell Positions In HDR Brachytherapy
The Varian GYN ring applicator exhibits known dwell position dependence on source wire behavior and rotational orientation. For the Bravos HDR afterloader, the vendor recommends repeated periodic verification of ring dwell positions, including following Ir-19...
Poster Program · Therapy Physics
Pediatric Cardiac Substructure Dose Coefficients for Chest and Abdomen–Pelvis CT Using a Size-Dependent Whole-Body Phantom Library
Pediatric dose from CT remains a concern, and recent evidence from radiotherapy has increased interest in dose to specific cardiac substructures (e.g., the left anterior descending coronary artery). Pediatric whole-body phantoms that contain detailed cardiac...
Proffered Program · Diagnostic and Interventional Radiology Physics