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Time‐resolved MR angiography for the classification of endoleaks after endovascular aneurysm repair
Author(s) -
Cohen Emil I.,
Weinreb David B.,
Siegelbaum Robert H.,
Honig Sean,
Marin Michael,
Weintraub Joshua L.,
Lookstein Robert A.
Publication year - 2008
Publication title -
journal of magnetic resonance imaging
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.563
H-Index - 160
eISSN - 1522-2586
pISSN - 1053-1807
DOI - 10.1002/jmri.21257
Subject(s) - radiology , medicine , endovascular aneurysm repair , angiography , aneurysm , abdominal aortic aneurysm
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.