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(a) Initial plan contouring. (b) Automatic contouring using Adapt Anatomy at the time of 20 Gy CBCT and (c) 40 Gy CBCT. The GTV is shown in red, the PTV in light blue, the esophagus in magenta, the spinal cord in blue, the left lung in light yellow, and the right lung in light purple.
CBCT: cone-beam computed tomography; GTV: gross tumor volume; PTV: planning target volume
