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In this study, arterial spin-labeling perfusion was used as a means to assess the well-known angiogenic activity seen in pituitary macroadenomas. Eleven patients with macroadenoma were studied and their ASL results correlated with histologic total microvascular density. The authors found that routine contrast enhancement did not correlate with microvascular density but CBF did and it also correlated with hypervascularity at surgery or postoperative bleeding in 4 instances.

In this series of 200 patients treated for unruptured intracranial aneurysms, 65% were sent to a routine floor instead of the intensive care unit as is commonly done. Only one patient required transfer to the ICU and thus the authors concluded that in patients without significant co-morbidities, intraoperative complications, or complex aneurysms, routine placement in the ICU after embolization is not warranted.