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Author profile
Cheewai Cheng, PhD
Northwestern Memorial Hospital
Comprehensive Dosimetric Evaluation of Eye Physics I-125 Episcleral Plaque Brachytherapy Using DVH-Based and Geometric Quality Indices for Ocular Melanoma.
Episcleral plaque brachytherapy is the standard eye-preserving treatment for medium-sized ocular melanoma (OM), yet dosimetric evaluation remains challenging due to steep dose gradients, plaque curvature, and anisotropic source geometry. This study presents a...
Poster Program · Therapy Physics
Effect of PTV Margins and Lung Density Variations on Target Coverage for Small‑Volume Lung Lesions In SBRT
Target coverage in lung SBRT is influenced by tumor size, PTV margin, and local lung density. This study investigates target dose coverage in low‑density lung as a function of PTV margins and lung density.
Poster Program · Therapy Physics
Reframing Biological Potency In SBRT: A Damage–Commitment Index Framework Incorporating Sublethal Damage Repair Saturation and Immune Effects.
Ablative hypofractionated radiotherapy(AHRT), including stereotactic body radiotherapy(SBRT) and stereotactic radiosurgery(SRS), achieves tumor control that is not reliably predicted by Linear–Quadratic (LQ) model. Clinical observations of failure of BED equi...
Poster Program · Therapy Physics