Hemodynamic changes around cerebral arteriovenous malformation before and after embolization measured with pet

To estimate the changes in regional cerebral blood flow (rCBF) around cereb ral arteriovenous malformation (AVM) before and after embolization, 6 patie nts with AVM were sequentially examined with positron emission tomography ( PET). PET depicted the remodeling of rCBf in the ipsilateral hemisphere of AVM after embolization. Decrease of rCBF in the ipsilateral hemisphere was also detected in patients with focal symptoms before embolization, and impr ovement of clinical symptoms after embolization corresponded to disappearan ce of rCBF decrease. PET can detect hemodynamic changes after embolization, and has a possibility to estimate the effect of embolization in patients w ith AVM.