| Assessment of intracranial arterial stenosis with multidetector row CT angiography: a postprocessing techniques comparison. | |
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MedLine Citation:
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PMID: 20053812 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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BACKGROUND AND PURPOSE: It was demonstrated the some patients with stroke have intracranial stenosis of 50% or greater and the identification of intracranial arterial stenosis is extremely important in order to plan a correct therapeutical approach. The aim of this study was to assess the image quality and intertechnique agreement of various postprocessing methods in the detection of intracranial arterial stenosis. MATERIAL AND METHODS: Eighty-five patients who were studied by using a multidetector row CT scanner were retrospectively analyzed. A total of 2040 segments were examined in the 85 subjects. Intracranial vasculature was assessed by using MPR, CPR, MIP, and VR techniques. Two radiologists reviewed the CT images independently. Cohen weighted kappa statistic was applied to calculate interobserver agreement and for image accuracy for each reconstruction method. Sensitivity, specificity, PPV, and NPV were also calculated by using the consensus read as the reference. RESULTS: Two hundred fifteen (10.5%) stenosed artery segments were identified by the observers in consensus. The best intermethod kappa values between observers 1 and 2 were obtained by VR and MIP (kappa values of 0.878 and 0.861, respectively), whereas MPR provided the lowest value (kappa value of 0.282). VR showed a sensitivity for detecting stenosed segments of 88.8% and 91.6% for observers 1 and 2, respectively. The highest positive predictive value was also obtained by VR at 95% and 99% for observers 1 and 2, respectively. Image accuracy obtained by using VR was the highest among all reconstruction methods in both observers (185/255 and 177/255 for observers 1 and 2, respectively). CONCLUSIONS: The results of our study suggest that VR and MIP techniques provide the best interobserver and intertechnique concordance in the analysis of intravascular cranial stenosis. |
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Authors:
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L Saba; R Sanfilippo; R Montisci; G Mallarini |
Publication Detail:
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Type: Comparative Study; Evaluation Studies; Journal Article Date: 2010-01-06 |
Journal Detail:
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Title: AJNR. American journal of neuroradiology Volume: 31 ISSN: 1936-959X ISO Abbreviation: AJNR Am J Neuroradiol Publication Date: 2010 May |
Date Detail:
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Created Date: 2010-05-17 Completed Date: 2010-09-14 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8003708 Medline TA: AJNR Am J Neuroradiol Country: United States |
Other Details:
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Languages: eng Pagination: 874-9 Citation Subset: IM |
Affiliation:
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Department of Radiology, Policlinico Universitario, University of Cagliari, Monserrato, Cagliari, Italy. lucasaba@tiscali.it |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Aged Aged, 80 and over Algorithms* Cerebral Angiography / methods* Constriction, Pathologic / radiography Female Humans Intracranial Arterial Diseases / radiography* Male Middle Aged Radiographic Image Enhancement / methods* Radiographic Image Interpretation, Computer-Assisted / methods* Reproducibility of Results Sensitivity and Specificity Tomography, X-Ray Computed / methods* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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