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Case geometries: (a) TG-119 prostate phantom with PTV shown in pink, bladder in yellow, and rectum in brown. (b) Pancreas case with PTV in pink, liver in brown, kidneys in yellow, and cord in green (GI structures not shown for clarity). (c) Brain case with PTV shown in pink, eyes in purple, left optic nerve in yellow, optic chiasm in green, and normal brain in light blue.
