| Interobserver variability in the interpretation of renal digital subtraction angiography. | |
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MedLine Citation:
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PMID: 10541106 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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OBJECTIVE: Our purpose was to analyze interobserver variability in the interpretation of renal digital subtraction angiography and to describe the main factors associated with observer discrepancies. MATERIALS AND METHODS: Forty-nine cases of unilateral atheromatous renal artery stenosis of more than 60% were quantified first by local investigators in a multicenter study and then by five other radiologists. Differences between radiologists for the minimum diameter (Dmin), the reference diameter (Dref), and the percentage of stenosis of the renal arteries were analyzed. Interpretations by the local investigators were then compared with the gold standard, defined as the mean for the five radiologists. RESULTS: The average SD for estimation of all renal artery stenoses by all radiologists was 7% for stenosis percentage, 0.5 mm for Dmin, and 0.7 mm for Dref. Main discrepancies occurred more frequently in cases of weakly opacified renal artery stenosis and poststenotic dilatation. The observations of local investigators disagreed by more than two SDs (14%) with the gold standard for 11 of 49 cases (22%). CONCLUSION: The accuracy of digital subtraction angiography in renal artery interpretations is poor because of variations in evaluating both Dmin and Dref. Precise and reproducible methods for quantification of renal artery stenosis are required. |
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Authors:
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J F Paul; I Cherrak; M C Jaulent; G Chatellier; P F Plouin; P Degoulet; J C Gaux |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: AJR. American journal of roentgenology Volume: 173 ISSN: 0361-803X ISO Abbreviation: AJR Am J Roentgenol Publication Date: 1999 Nov |
Date Detail:
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Created Date: 1999-11-09 Completed Date: 1999-11-09 Revised Date: 2008-02-15 |
Medline Journal Info:
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Nlm Unique ID: 7708173 Medline TA: AJR Am J Roentgenol Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 1285-8 Citation Subset: AIM; IM |
Affiliation:
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Cardio-Vascular Radiology, Broussais University Hospital, Paris, France. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Aged Angiography, Digital Subtraction* Arteriosclerosis / radiography* Female Humans Male Middle Aged Observer Variation Reference Standards Renal Artery Obstruction / radiography* |
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