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Cluster analysis of BF patterns in GBM. (A) Dendrogram of BF maps of 38 GBM patients shows 2 major clusters of 17 (group 1) and 21 (group 2) patients. (B) Representative imaging of GBM patient from each group showing T1 post-contrast MR (left), BF map with tumor outlined in white (middle), and BF histogram of outlined region (right).
