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MR-perfusion maps and anatomy before (A-D) and after (E-F) cranioplastic repair of a patient with the "sinking skin flap syndrome" with delayed motor deficits. A focal area of hypoperfusion (reduced blood flow and blood volume, and increased mean transit time) is observed in the right parietal cortex (A-C) beneath the skin flap. After cranioplasty, brain perfusion maps show no longer show a significant perfusion deficit.
