Risk-Adaptive Volumetric Modulated Arc Therapy Using Biological Objective Functions for Subvolume Boosting in Radiotherapy

Figure 1

Isodose lines for the five patients. PTV-H is the green colorwash, PTV-R is the red colorwash and the rectum is the yellow colorwash. P1 and P2 each had a rectal balloon; P3, P4, and P5 had no balloon.

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