MRI changes due to early-delayed conformal radiotherapy and postsurgical effects in patients with brain tumors

Conclusions: Radiotherapy status was not related to changes in MRI ratings during the weeks/months after XRT. Findings contradict assumptions about radiographically evidenced early-delayed XRT effects. Increases in T2-weighted hyperintensities during the 1-6-month period postconformal radiotherapy for low-grade tumors are likely not related to early-delayed XRT effects.