Diagnostic value of 3.0 T magnetic resonance angiography screening in intracranial artery fenestration

Objective To explore the detection rate,common location and clinical significance of intracranial artery fenestration by a large sample cases.Methods From October 2009 to March 2011,25 of 2 036 patients enrolled three dimensional time of flight(3D-TOF) magnetic resonance angiography(MRA) were,diagnosed artery fenestration(fenestration group),male 14,female 11,aged 30-81 years old,mean age 60.5 years old.The reconstructed images were processed by maximal intensity projection(MIP) and volume rending(VR) techniques.The imaging feature of intracranial arteries fenestration and correlation between aneurysm were analyzed.Results Twenty-five(1.23 %,25/2 036) fenestrations of intra and extracranial artery were detected.In 25 fenestrations,11 were located in basilar artery,4 in intracranial vertebral artery,6 in anterior communicating artery,3 in middle cerebral artery,1 in posterior cerebral artery.Six cases combined with aneurysms,4 were located in intracranial internal carotid artery and 2 in anterior cerebral artery.Conclusion It is demonstrated that 3D-TOF MRA could diagnose and display accurately the intracranial artery fenestration.