A−C, Representative images from a patient with recurrent GBM: CE-T1 (A), CE-SWI (B), and ADC maps (C). D−F, Automatically defined enhancement masks are overlaid on the corresponding maps seen in the top row. Note the regions of nonspecific BBB leakage within the CE-T1 mask, which correlate to areas of necrosis and vascular structures on the SWI maps (arrow).