Time-resolved MR angiography for the classification of endoleaks after endovascular aneurysm repair
✍ Scribed by Emil I. Cohen; David B. Weinreb; Robert H. Siegelbaum; Sean Honig; Michael Marin; Joshua L. Weintraub; Robert A. Lookstein
- Publisher
- John Wiley and Sons
- Year
- 2008
- Tongue
- English
- Weight
- 302 KB
- Volume
- 27
- Category
- Article
- ISSN
- 1053-1807
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✦ Synopsis
Abstract
Purpose
To evaluate the utility of time‐resolved MR angiography (TR‐MRA), compared with digital subtraction angiography (DSA), in the classification of endoleaks in patients who have undergone endovascular aneurysm repair (EVAR).
Materials and Methods
Thirty‐one patients who had undergone EVAR to repair an abdominal aortic aneurysm were evaluated with both TR‐MRA and DSA to determine endoleak etiology. The patient population consisted of 26 men and 5 women with a mean age of 78.5 years (range, 55–93 years). The mean time interval between TR‐MRA and DSA was 1.5 weeks (range, 1–8 weeks). Endoleaks were classified as type II when enhancement of the external iliac vessels was observed before the appearance of the endoleak; otherwise the endoleak was classified as type I or III. The results of TR‐MRA classification were compared with the reference gold standard, DSA.
Results
Agreement between TR‐MRA and DSA regarding endoleak classification occurred in 30 of 31 cases (97%). Discordant classification occurred in a case in which a Type II endoleak was misclassified as a Type III due to failure to visualize a lumbar vessel.
Conclusion
TR‐MRA is highly effective in classifying endoleaks following EVAR when compared with DSA. J. Magn. Reson. Imaging 2008;27:500–503. © 2008 Wiley‐Liss, Inc.