Intracranial aneurysms: evaluation in 200 patients with spiral CT angiography

The goal of this study was to assess the usefulness of spiral CT angiography (CTA) with three- dimensional reconstructions in defining intracranial aneurysms, particularly around the Circle of Willis. Two hundred consecutive patients with angiographic and/or surgical correlation were studied between...

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Bibliographic Details
Published inEuropean radiology Vol. 11; no. 1; pp. 123 - 130
Main Authors Young, N, Dorsch, N W, Kingston, R J, Markson, G, McMahon, J
Format Journal Article
LanguageEnglish
Published Germany Springer Nature B.V 2001
Subjects
Adolescent
Adult
Aged
Aged, 80 and over
Aneurysms
Carotid arteries
Cerebral Angiography
Circle of Willis - diagnostic imaging
Female
Genetic Predisposition to Disease - genetics
Hemorrhage
Humans
Imaging, Three-Dimensional
Intracranial Aneurysm - diagnostic imaging
Intracranial Aneurysm - genetics
Intracranial Aneurysm - surgery
Male
Medical imaging
Middle Aged
Neurosurgery
Patients
Risk Factors
Subarachnoid Hemorrhage - diagnostic imaging
Subarachnoid Hemorrhage - genetics
Subarachnoid Hemorrhage - surgery
Surgery
Tomography, X-Ray Computed
Veins & arteries
Work stations
Australia
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Summary:The goal of this study was to assess the usefulness of spiral CT angiography (CTA) with three- dimensional reconstructions in defining intracranial aneurysms, particularly around the Circle of Willis. Two hundred consecutive patients with angiographic and/or surgical correlation were studied between 1993 and 1998, with CTA performed on a GE HiSpeed unit and Windows workstation. The following clinical situations were evaluated: conventional CT suspicion of an aneurysm; follow-up of treated aneurysm remnants or of untreated aneurysms; subarachnoid haemorrhage (SAH) and negative angiography; family or past aneurysm history; and for improved definition of aneurysm anatomy. Spiral CTA detected 140 of 144 aneurysms, and an overall sensitivity of 97%, including 30 of 32 aneurysms 3 mm or less in size. In 38 patients with SAH and negative angiography, CTA found six of the seven aneurysms finally diagnosed. There was no significant artefact in 17 of 23 patients (74%) with clips. The specificity of CTA was 86% with 8 false-positive cases. Spiral CTA is very useful in demonstrating intracranial aneurysms.
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ISSN:0938-7994
1432-1084
DOI:10.1007/s003300000523