Comparison of intra-arterial digital subtraction angiography, magnetic resonance angiography and duplex ultrasonography for measuring carotid artery stenosis
Autor: | H. Verma, T. C. S. Cox, K. B. Modaresi, Paul Summers, Peter N Taylor, T. S. Padayachee, J. M. Jarosz |
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Rok vydání: | 1999 |
Předmět: |
Male
medicine.medical_specialty Duplex ultrasonography medicine.medical_treatment Image subtraction Carotid endarterectomy Sensitivity and Specificity Magnetic resonance angiography medicine.artery Humans Medicine Carotid Stenosis Aged Retrospective Studies Observer Variation Ultrasonography Doppler Duplex medicine.diagnostic_test business.industry Angiography Digital Subtraction Digital subtraction angiography Middle Aged medicine.disease Stenosis Angiography cardiovascular system Female Surgery Radiology Internal carotid artery business Magnetic Resonance Angiography |
Zdroj: | British Journal of Surgery. 86:1422-1426 |
ISSN: | 1365-2168 0007-1323 |
Popis: | Background Duplex ultrasonography and magnetic resonance angiography (MRA) are becoming competitive alternatives to angiography for determining the degree of internal carotid artery (ICA) stenosis. Varying reports have been published regarding the suitability of each technique for grading ICA disease. This retrospective study compared the merits of these three modalities for measuring ICA stenosis. Methods One hundred and eleven patients being considered for carotid endarterectomy underwent intra-arterial digital subtraction angiography (DSA) via arch injection. Duplex imaging was performed in all patients and MRA in 50. The degree of carotid stenosis estimated by the three modalities was compared. Results There was good correlation between subjectively graded MRA and DSA images (r = 0·87, P < 0·001, n = 82 carotids) but poor correlation for objective estimates. MRA tended to underestimate the degree of stenosis (bias – 4·5 per cent) compared with DSA, but showed good correlation with duplex ultrasonography estimates (r = 0·86, P < 0·001, n = 87 carotids). Both non-invasive modalities produced high values of sensitivity and specificity in estimating stenoses of greater than 70 per cent. MRA was less sensitive for distinguishing between severe stenosis and complete occlusion. Conclusion This study did not resolve the debate regarding the method of choice as both MRA and duplex ultrasonography were accurate for imaging carotid stenoses. |
Databáze: | OpenAIRE |
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