Cervical carotid MR angiography with multiple overlapping thin-slab acquisition: comparison with conventional angiography.
- 1 December 1993
- journal article
- research article
- Published by American Roentgen Ray Society in American Journal of Roentgenology
- Vol. 161 (6) , 1269-1277
- https://doi.org/10.2214/ajr.161.6.8249741
Abstract
Multiple overlapping thin-slab acquisition (MOTSA) is a hybrid time-of-flight MR angiography technique that combines the advantages of two- and three-dimensional methods. A venetian blind-like artifact, resulting from variations in signal intensity at slab boundaries, is a potentially significant disadvantage. The objective of this study was to determine the accuracy of MOTSA MR angiography for the measurement of stenosis and to evaluate the effectiveness of modifications to reduce the venetian blind artifact.Fifty-one consecutive patients undergoing conventional and MR angiography of the carotid arteries for suspected atherosclerotic disease were studied. Methods established in the North American Symptomatic Carotid Endarterectomy Trial (NASCET) were used to measure stenosis. Measurements from the conventional angiograms were compared with those from the MR angiograms. Modifications of the MR angiographic technique that were instituted after the initial 26 patients to reduce the venetian blind artifact i...Keywords
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