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題 名 | Detection and Assessment of Circle of Willis Aneurysms in Acute Subarachnoid Hemorrhage with Three-Dimensional Computed Tomographic Angiography: Correlation with Digital Substraction Angiography Findings=以三維電腦斷層血管攝影檢出及評估Willis 環動脈瘤導致之急性下蜘蛛膜出血:與數位式減影血管攝影像之互相關連 |
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作 者 | 賴炳宏; 楊建芳; 潘慧本; 陳坤煌; 何治軍; 許書雄; | 書刊名 | 臺灣醫學會雜誌 |
卷 期 | 98:10 1999.10[民88.10] |
頁 次 | 頁672-677 |
分類號 | 415.384 |
關鍵詞 | 三維電腦斷層血管攝影; Willis 環動脈瘤; 急性下蜘蛛膜出血; 數位式減影血管攝影像; Intracranial aneurysm; Three-dimensional computed tomographic angiography; Subarachnoid hemorrhage; Digital substraction angiography; |
語 文 | 英文(English) |
英文摘要 | In this retrospective study, we examined the usefulness of computed tomographic angiography (CTA) for the detection and assessment of circle of Willis aneurysms in patients with acute nontraumatic subarachnoid hemorrhage (SAH), using selective digital substraction angiography (DSA) as the gold standard. Thirty -five patients who presented with acute, nontraumatic SAH, diagnosed on the basis of unenhanced computed tomography or lumbar puncture findings or both, underwent both CTA and DSA. The CTA images were interpreted for the presence, location, size, and shape of the aneurysm, presence of a neck, and relationship of the aneurysm to adjacent arterial branches. The CTA and DSA images were then compared, with the latter images serving as the gold standard. DSA revealed 37 aneurysms in 32 patients and ruled out intracranial aneurysms in the remaining three. The sensitivity and specificity of CTA for aneurysm detection were 97% and 100%, respectively. The size of the smallest aneurysm shown was 4 mm, and the largest aneurysm was 21 mm. The size and lobularity of the aneurysms estimated from CTA images corresponded well with those estimated from DSA images. In addition, CTA provided a three-dimensional representation of the aneurysmal lesion, which was considered useful for surgical planning. Our results confirm the accuracy of CTA in comparison with DSA. Because of its reliability, minimal invasiveness, and rapidity, CTA may become the technique of choice for neuroradiologic work-up of SAH patients DSA then would be used to diagnose intracranial aneurysms only in selected, questionable cases. |
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