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12 Gy volume plotted against the number of targets for all patients for (a) conformal arc and (b) VMAT techniques. The difference in the 12 Gy volume and absolute risk of S-NEC between the two techniques is plotted in (c) and (d) respectively. Difference in the absolute risk of S-NEC between VMAT and conformal arc technique. A positive difference means that the VMAT absolute risk of S-NEC is higher.
