An intraoperative Laser Speckle Imaging (LSI) perfusion map of the left hemisphere of a living human brain (frontal lobe to the left, occipital lobe to the right) at a mean arterial pressure of 72 mmHg during hemicraniectomy. By adjusting blood pressure pharmacologically, LSI can visualize changes in cerebral perfusion and its autoregulation. See Hecht et al. pp 358–368 in this issue.
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