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Author Goldsher, Dorith ♦ Shreiber, Reuven ♦ Shik, Venyamin ♦ Tavor, Yonit ♦ Soustiel, Jean F.
Source CiteSeerX
Content type Text
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Subject Domain (in DDC) Computer science, information & general works ♦ Data processing & computer science
Subject Keyword Vertebrobasilar Vasospasm ♦ Multisection Ct Angiography ♦ Vertebrobasilar System ♦ Forty-three Mcta Study ♦ Multisection Spiral Ct Scanner ♦ Basilar Artery ♦ High Flow Velocity ♦ Maximum Intensity Projection ♦ Transcranial Doppler ♦ 20-second Delay ♦ Vessel Diameter ♦ Posterior Circulation ♦ Long Axis ♦ Optimal Mean ♦ Cerebral Vasospasm ♦ Volume-rendering Reconstruction ♦ Vertebrobasilar Artery ♦ Reformatted Multiplanar Reformation ♦ Contrast Material ♦ Tcd Finding ♦ 1-mm Collima-tion ♦ Tcd Recording ♦ Tcd Imaging ♦ Narrowed Artery ♦ Different Intracranial Location
Abstract BACKGROUND AND PURPOSE:Optimal means for assessing cerebral vasospasm, mainly at the vertebrobasilar system, have not been established. The purpose of this study was to evaluate the role of multisection CT angiography (MCTA) in the detection and quantification of vertebrobasilar vasospasm (VBS) indicated on transcranial Doppler (TCD) imaging in patients with subarachnoid hemorrhage (SAH). METHODS: Forty-three MCTA studies of the vertebrobasilar arteries were performed with a multisection spiral CT scanner in 36 patients with SAH. Parameters used were 1-mm collima-tion, 0.625Q pitch, 120 kV, and 250 mAs. Contrast material was injected (80–100 mL, 3 mL/s) after a 15–20-second delay. Postprocessing of the vertebrobasilar system was performed by using maximum intensity projection and volume-rendering reconstruction. Vessel diameter was measured at different intracranial locations along the vertebral and basilar arteries perpen-dicular to their long axis by using curved reformatted multiplanar reformation. TCD imaging of the posterior circulation was performed within 24 hours. RESULTS: MCTA demonstrated narrowed arteries compatible with VBS in 13 patients, consistent with TCD findings. Despite TCD recordings of high flow velocity in three other
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