CT during selective arteriography: anatomical assessment of unruptured intracranial aneurysms before endovascular treatment |
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Authors: | Nomura M Kida S Uchiyama N Sanada J Yoshikawa J Yamashima T Yamashita J Matsui O |
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Institution: | (1) Department of Neurosurgery, Kanazawa University School of Medicine, 13–1 Takara-machi, Kanazawa 920–8641, Japan e-mail: nomunomu@earthlink.net Tel.: +81-76-2 65-23 84 Fax: +81-76-2 34-42 62, JP;(2) Department of Radiology, Kanazawa University School of Medicine, 13–1 Takara-machi, Kanazawa 920–8641, Japan, JP |
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Abstract: | Our aim was to investigate the usefulness of helical CT during selective angiography (CT arteriography) in pretreatment assessment
of unruptured intracranial aneurysms. We studied 47 unruptured aneurysms in 34 prospectively recruited patients for whom endovascular
embolisation was initially considered. As pretreatment assessment, we performed rotational digital subtraction angiography
(DSA) followed by CT arteriography. The findings on axial source images (axial images) and reconstructed three-dimensional
CT angiography (3D-CTA) of CT arteriography were compared to those of rotational DSA, with particular attention to the neck
of the aneurysm and arterial branches adjacent to it. Information provided by CT arteriography was more useful than that of
rotational DSA as regards the neck in 25 (53 %) of 47 cases and as regards branches in 18 (49 %) of 37 aneurysms. On axial
images, small arteries such as the anterior choroidal artery were seen in some cases. CT arteriography can provide valuable
additional information about unruptured aneurysms, which cannot be obtained by rotational DSA alone. This technique is useful
for obtaining anatomical information about aneurysm anatomy and for deciding the therapeutic strategy.
Received: 22 May 2000/Accepted: 25 September 2000 |
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Keywords: | Unruptured aneurysms Helical computed tomography Computed tomographic arteriography |
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