Peripheral vascular occlusive disease: accuracy and reliability of time-of-flight MR angiography.
Radiology
; 192(2): 351-7, 1994 Aug.
Article
em En
| MEDLINE
| ID: mdl-8029396
ABSTRACT
PURPOSE:
To determine the accuracy and reliability of magnetic resonance (MR) angiography for identification of stenosis and patent distal vessels in patients with peripheral vascular disease. MATERIALS ANDMETHODS:
Two-dimensional time-of-flight MR angiography and conventional arteriography were performed in 22 patients. Four blinded radiologists independently graded multiple anatomic segments.RESULTS:
MR angiography allowed detection of more patent vessel segments than did conventional arteriography. For detection of significant stenosis (> 75%), MR angiography had 43%-67% sensitivity and 74%-89% specificity. Discrepancies in detection of significant stenosis occurred in 39 segments for the most accurate reviewer; 27 of these discrepancies were avoidable.CONCLUSION:
For detection of significant stenosis, MR angiography has low to moderate sensitivity and specificity; however, observer variability appears to be a major contributing factor to the discrepancies. Greater reviewer experience or techniques for improving reliability may improve the accuracy of MR angiography in peripheral vascular disease.
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Base de dados:
MEDLINE
Assunto principal:
Arteriopatias Oclusivas
/
Imageamento por Ressonância Magnética
/
Perna (Membro)
Idioma:
En
Ano de publicação:
1994
Tipo de documento:
Article