Variations in Rectal Volumes and Dosimetry Values Including NTCP due to Interfractional Variability When Administering 2D-Based IG-IMRT for Prostate Cancer

Figure 2

NTCPs for the rectum: predictions based on initial plan and on-treatment CBCT analyses (8 CBCTs/patient) for rectal grade ≥ 2 (RTOG) using the LKB model.