The Diagnositic Value of CTA in Fenestration of Intracranial Arteries

Objective To assess the frequency and common location of fenestrations of intracranial arteries and a possible relationship with aneurysms.Materials and Methods From December 2008 to October 2009,412 craniocervical CT angiography(CTA)were reviewed.The reconstructed images were processed using Volume Rending(VR)and maximal intensity projection(MIP)techniques.Results In 41 patients,44 fenestrations were detected.23 fenestrations located in anterior communicating artery region,18 fenestrations in basilar artery,2 fenestrations in intracranial vertebral artery and 1 fenestration in middle cerebral artery.The frequency of fenestrations in 48 patients with aneurysms were not different from that in 326 patients without aneurysms.Conclusion With CTA,intracranial artery fenestrations could be clearly detected in 10.7% patients.The common locations were the anterior communicating artery region and basilar artery.A definite relationship between fenestrations and aneurysms couldn't be concluded.