Original scientific paper
Evaluation of Circle of Willis Aneurysms with Spiral Computed Tomographic Angiography
Zlatko Pavčec
Ivan Žokalj
Hussein Saghir
Andrej Pal
David Ozretić
Dijana Podoreški
Abstract
The aim of this retrospective study is to evaluate the specificity and sensitivity of spiral computed tomographic angiograohy
(SCTA) in the detection of intracranial aneurysms. Patients were included in this study on the ground of the
SCTA, digital subtraction angiography, magnetic resonance angiography, neurosurgeons operative findings and autopsy
reports. Scanning protocol was slice thickness of 1mm, reconstruction interval of 0.5 mm, pitch 1. Flow rate was
3–4 ml/s, with standard scan delay time of 15–20s. In 18 patients with average age of 49.3 years SCTA results were positive
for cerebral aneurysms and confirmed with other methods. On a per aneurysm basis SCTA sensitivity for detection of
aneurysms was 89.47% specificity was 86.96%, positive predictive value of 85.00% and negative predictive value of
90.91%. SCTA should be used for the detection of cerebral aneurysms, especially for aneurysms with maximum diameter
larger than 5mm.
Keywords
computed tomography; angiography; aneurysms
Hrčak ID:
27680
URI
Publication date:
13.12.2006.
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