Planning T2 MRI fused with FLAIR images from same date and T1 MRI obtained at time of failure. The failure volume (rGTV) is contoured in light green. The T2 and FLAIR CTVs are outlined in red and cyan respectively. The T2 and FLAIR PTVs are outlined in orange and dark blue respectively. The FLAIR PTV encompasses a greater portion of the failure volume than T2 PTV. Overlay of the 95% dose color wash shows that the failure is central.