(A) An example of a SIB plan for prone case with isodose lines of 48 (red), 45.6 (pink), 43.2 (cyan), 38 (purple), 16 (dark green), 8 (brown), 4 (blue) and 2.4 (dark blue) Gy in a transverse slice. The Lump PTV_Eval (color wash, purple) and Breast PTV_Eval (color wash, dark green) are also shown. (B) DVHs from the same plan.