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AJNR - American Journal of Neuroradiology

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American Journal of Neuroradiology 21:421-425 (2 2000)
© 2000 American Society of Neuroradiology

ARTICLE

Dynamic CT Perfusion to Assess the Effect of Carotid Revascularization in Chronic Cerebral Ischemia

Heidi C. Roberts^a, William P. Dillon^a and Wade S. Smith^a

^a From the Departments of Radiology (H.C.R., W.P.D.) and Neurology (W.S.S.), University of California, San Francisco, San Francisco, CA.

Summary: We present the case of a female patient who was studied with dynamic contrast-enhanced CT perfusion before and after carotid revascularization. Before treatment, there was decreased perfusion in the ipsilateral insula, which was shown to be resolved on the scan obtained 1 day after treatment, indicating the technical success of the revascularization. In the ipsilateral basal ganglia, there was delayed contrast agent clearance from the tissue, which was attributed to vasodilation; after revascularization, there remained a subtle stenotic effect. The observed changes in the dynamic CT perfusion study suggest that this technique may be a useful tool in the evaluation of patients with asymmetrical cerebral blood flow.

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