Figure 10. GTV + 2 mm DeIIV relative to prescribed dose.

The scatter plots show the correlation between the GTVs and the GTV + 2 mm D_eIIV (%) relative to the prescribed dose (GTV D_{V-0.01 cc}). The GTVs are limited to ≤4.50 cc in B. The result of SRCC is added in A.

GTV: gross tumor volume; GTV + 2 mm: GTV evenly expanded by 2 mm; PD: prescribed dose; D_eIIV: a minimum dose to cover an irradiated isodose volume equivalent to a target volume; D_{V-0.01 cc}: a minimum dose to cover a target volume minus 0.01 cc; SRCC: Spearman’s rank correlation coefficient.