Fig. 4

a An example for dose volume histograms (DVHs) of the target with different offset values. b An example of cumulative dose DVH for D^nomial and D^true. Where D^nomial represents the accumulated dose based on the 4DCT_traditional which was used for planning, D^true represents the accumulated dose incorpated heterogeneity breathing pattern with mean amplitude 15 mm, standard deviation of amplitude 3.75 mm, mean period 4 s and standard deviation of period 0.8 s