Contrast-Enhanced 3D MR Angiography of the Carotid Artery: Comparison with Conventional Digital Subtraction Angiography

Since 1996, several preliminary studies have shown the usefulness of contrast material-enhanced MR angiography for imaging supraaortic vessels. The aim of this study was to compare the accuracy of contrast-enhanced 3D MR angiography with that of digital subtraction angiography (DSA) in the evaluatio...

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Bibliographic Details
Published in:American journal of neuroradiology 2002-02, Vol.23 (2), p.213-219
Main Authors: Remonda, Luca, Senn, Pascal, Barth, Alain, Arnold, Marcel, Lovblad, Karl-Olof, Schroth, Gerhard
Format: Article
Language:English
Subjects:
Adolescent
Adult
Aged
Aged, 80 and over
Angiography, Digital Subtraction - standards
Biological and medical sciences
Brain
Carotid Arteries - diagnostic imaging
Carotid Arteries - pathology
Carotid Stenosis - diagnosis
Child
Contrast Media
Double-Blind Method
Female
Gadolinium DTPA
Humans
Imaging, Three-Dimensional
Magnetic Resonance Angiography - standards
Male
Medical sciences
Middle Aged
Neurology
Sensitivity and Specificity
Vascular diseases and vascular malformations of the nervous system
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Summary:Since 1996, several preliminary studies have shown the usefulness of contrast material-enhanced MR angiography for imaging supraaortic vessels. The aim of this study was to compare the accuracy of contrast-enhanced 3D MR angiography with that of digital subtraction angiography (DSA) in the evaluation of carotid artery stenosis. A blinded comparison of first-pass contrast-enhanced MR angiography with conventional DSA was performed in 120 patients (240 arteries). MR angiography was performed with a 1.5-T magnet with gradient overdrive equipment, by using a coronal radiofrequency-spoiled 3D fast low-angle-shot sequence after the intravenous injection of gadodiamide. The guidelines of the North American Symptomatic Carotid Endarterectomy Trial for measuring stenosis of the internal carotid artery were applied on maximum intensity projection (MIP) images and conventional catheter angiograms. Grading of stenoses on MR angiograms agreed with grading of stenoses on DSA images in 89% of arteries. In the severe stenosis group (70-99%), agreement was 93%. All internal carotid occlusions (n = 28) and seven of nine pseudo-occlusions were accurately detected with contrast-enhanced MR angiography. The correlation between MR angiography and DSA for determination of minimal, moderate, and severe stenoses and occlusion was statistically significant (r = 0.91, P
ISSN:0195-6108
1936-959X