Cohen Emil I, Weinreb David B, Siegelbaum Robert H, Honig Sean, Marin Michael, Weintraub Joshua L, Lookstein Robert A
Department of Radiology, Mount Sinai Hospital, New York, NY 10029, USA.
J Magn Reson Imaging. 2008 Mar;27(3):500-3. doi: 10.1002/jmri.21257.
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).
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.
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.
TR-MRA is highly effective in classifying endoleaks following EVAR when compared with DSA.
评估时间分辨磁共振血管造影（TR-MRA）与数字减影血管造影（DSA）相比，在血管内动脉瘤修复（EVAR）患者内漏分类中的应用价值。
对31例行EVAR修复腹主动脉瘤的患者进行TR-MRA和DSA检查，以确定内漏病因。患者群体包括26名男性和5名女性，平均年龄78.5岁（范围55 - 93岁）。TR-MRA和DSA之间的平均时间间隔为1.5周（范围1 - 8周）。当在出现内漏之前观察到髂外血管强化时，内漏被分类为II型；否则内漏被分类为I型或III型。将TR-MRA分类结果与参考金标准DSA进行比较。
31例中有30例（97%）TR-MRA和DSA在内漏分类方面结果一致。在1例中，由于未能观察到腰血管，II型内漏被误分类为III型，出现了分类不一致的情况。
与DSA相比，TR-MRA在EVAR术后内漏分类中非常有效。
