Moyamoya Disease:Diagnostic Value of 64-slice Spiral CT Angiography

Objective To explore the 64-slice spiral CT angiography(MSCTA) findings and clinical value for diagnosis of moyamoya disease.Methods Seventeen patients with moyamoya disease underwent routine CT scanning and MSCT angiography.All the patients were confirmed by DSA.The angiograms obtained were processed on the ADW4.3 workstation to perform volume rending(VR),maximum intensity projection(MIP) and multiplanar Volume refomration(MPR) and curved planar reformatting(CPR).Results In all cases MSCTA showed the stenosis or obstruction of arteria carotis interna(ICA) or proximum of Wills circle,abnormal vessel network in brain basal part,including stenosis of bilateral ICA and anterior cerebral artery and middle cerebral artery(20 cases),one side middle cerebral artery(5 cases),bilateral anterior cerebral artery and middle cerebral artery(2 cases).The branch vessels could be evaluated with CTA images.VR was better on showing the stenosis of the vessels and its spatial relation with surrounding bone structure,MIP and MPR was better on showing abnormal vessel network in brain basal part and branch vessels.Conclusion With different reconstruction,64-slice spiral CT angiography(MSCTA) can well display the abnormal vessels and spatial relationship charateristic of moyamoya disease,the method is simple,fast,noninvasive,after volume rendering and volume rendening silhouette,can demonstrate the relationgship between spatial strcuture around the lesion,is a preferred tool for diagnosis of moyamoya disease.