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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.
  
  


  
  
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    	American Journal of Neuroradiology November 2013, 34 (11) 2152-2156; DOI: https://doi.org/10.3174/ajnr.A3636 
  
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