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Abstract
Perfusion CT is a recent CT based imaging modality Used to describe &
Evaluate Cerebral perfusion by estimating relative Values Of different cerebral
Perfusion Parameters as Cerebral blood Floe , Cerebral blood Volume & mean
Transit time.
Iodinated Contrast medium is used & Spiral Or multi-sline CT System are
Essential For the technique.
It is Found to be useful in evaluation of different Cerebral ischemic conditions
Including that associated With Stroke as Well as non-strok Conditions.
Perfusion CT is helpful in assement of cerebrovascular reserve in Patients With
Chronic Cerebral ischemic conditions for Cerebral Vascular bypass Surgery &
Patients undergoing temporary balloon Occlusion test as Well as Patients With
Symptoms Of Vasospasm after Subarachnoid hemorrhage.
Key Words : Perfusion CT, Non-Stroke, Cerebrovascular reserve