Diagnostic Accuracy of Early Computed Tomographic Angiography for Visualizing Medium Sized Inferior and Posterior Projecting Carotid System Aneurysms

AUTHORS

Hooshang Saberi 1 , * , Mohammad Hashemi 2 , Zohreh Habibi 2 , Ali Tayebi Meybodi 2 , Seyed Ali Fakhr Tabatabai 2 , Hazhir Saberi 2 , Sofia Saboori 2

1 Department of Neurosurgery, Brain and Spinal Cord Injuries Repair Research Center, Imam Khomeini Hospital, Tehran University of Medical Sciences, saberih@tums.ac.ir, Iran

2 Department of Neurosurgery, Brain and Spinal Cord Injuries Repair Research Center, Imam Khomeini Hospital, Tehran University of Medical Sciences, Iran

How to Cite: Saberi H, Hashemi M, Habibi Z, Tayebi Meybodi A, Fakhr Tabatabai S, et al. Diagnostic Accuracy of Early Computed Tomographic Angiography for Visualizing Medium Sized Inferior and Posterior Projecting Carotid System Aneurysms, Iran J Radiol. Online ahead of Print ; 8(3):139-144. doi: 10.5812/kmp.iranjradiol.17351065.3135.

ARTICLE INFORMATION

Iranian Journal of Radiology: 8 (3); 139-144
Published Online: November 25, 2011
Article Type: Research Article
Received: August 21, 2010
Accepted: July 15, 2011
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Abstract

Background: Conventional angiography, generally referred to as intra-arterial digital subtraction angiography, still remains the gold standard reference method for the diagnosis of intracranial aneurysms, helical computed tomography angiography (CTA) is a new non-invasive volumetric imaging method.
Objectives: This study was conducted to screen patients presenting with subarachnoidhemorrhage by CTA before conventional digital subtraction angiography (DSA) and subsequently comparing the results for various aneurysm projections.
Patients and Methods: In a prospective study, 99 consecutive patients with an initial diagnosis of subarachnoid hemorrhage were screened for aneurysms with CTA followed by conventional DSA. There were 17 cases with negative angiograms in whom repeat angiograms, three months later were negative for 15 cases, while two cases were found to bear aneurysm on the repeat examination. Eighty two patients had at least one proven aneurysm on initial DSA and two on the repeat angiogram. Out of 84 patients, five underwent endovascular treatment and 79 patients who underwent surgical clipping were considered for projection evaluation.
Results: Sensitivity of CTA was 98.78% (95% confidence interval [CI], 93.4-99.7%), while the specificity was 100% (95% CI, 81.57-100%) and the kappa coefficient of agreement between CTA and DSA was 96.5%. The most significant discrepancies with DSA findings were for visualizing the projection of inferior and posterior projecting proximal anterior circulation aneurysms.
Conclusions: Helical CTA was in good concordance with DSA for screening of cerebral aneurysms; however, for exact visualization of the aneurysm neck and its projection, especially if it is inferior or posterior, DSA remains the gold standard.


  • Implication for health policy/practice/research/medical education:
    This article approaches imaging techniques for screening cerebral aneurysms in subarachnoid hemorrhage which could help radiologists and clinicians to choose the appropriate imaging modalities in practice.
  • Please cite this paper as:
    Saberi H, Hashemi M, Habibi Z, Tayebi Meybodi A, Fakhr Tabatabai SA, Saberi H, et al. Diagnostic Accuracy of Early Computed Tomographic Angiography for Visualizing Medium Sized Inferior and Posterior Projecting Carotid System Aneurysms. Iran J Radiol. 2011;8(3): 139-44. DOI: 10.5812/kmp.iranjradiol.17351065.3135

Copyright © 2011, Tehran University of Medical Sciences and Iranian
Society of Radiology. Published by Kowsar M.P.Co. All rights reserved.


Keywords

Angiography Digital Subtraction Helical CT Intracranial Aneurysm

© 2011, Author(s). This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/) which permits copy and redistribute the material just in noncommercial usages, provided the original work is properly cited.

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