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Coronal CT slice of a lung cancer patient. Overlaid are either (A) the simulated delivered dose accumulated on the reference 4DCT phase deploying MLC tumor tracking and a MTV target definition approach at 1.5 T, (B) the delivered dose using the conventional, non-tracked ITV approach at 1.5 T and (C) the difference (A - B) between those two distributions. The GTV is contoured in dark green, while the MTV + 5 mm is contoured in light green and the ITV + 5 mm in yellow.
