Abstract
PURPOSE: To determine the clinical feasibility of a contrast material- enhanced two-dimensional (2D) magnetic resonance (MR) angiographic sequence in lower extremity arteries. MATERIALS AND METHODS: Four healthy volunteers and 12 patients underwent dynamic contrast-enhanced MR angiography; all patients also underwent conventional angiography. A 2D multisection gradient- echo sequence with image subtraction was used for all MR imaging examinations. RESULTS: Oblique-coronal contrast-enhanced MR angiography was completed in less than 4 minutes, with a 256 x 512 matrix. The arterial contrast enhancement ratio was 2.0 ± 0.8 (standard deviation), and the pre- and post-contrast contrast-to-noise ratios were 2.1 ± 13.8 and 46.2 ± 18.7, respectively. The sensitivity for MR angiography was 100% and specificity was 69% for distinction of vessels with greater than 50% stenoses from normal or mildly stenotic vessels. CONCLUSION: Dynamic contrast-enhanced 2D MR angiography is capable of increasing intraarterial signal intensity and depicting small vessel anatomy of the lower extremities over a large field of view in a short imaging time.
Original language | English |
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Pages (from-to) | 689-695 |
Number of pages | 7 |
Journal | Radiology |
Volume | 196 |
Issue number | 3 |
DOIs | |
Publication status | Published - 1995 |
Externally published | Yes |