MR angiography vs CT angiography in the follow-up of nitinol stent grafts in endoluminally treated aortic aneurysms.
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| Title: | MR angiography vs CT angiography in the follow-up of nitinol stent grafts in endoluminally treated aortic aneurysms. |
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| Authors: | Cejna, Manfred1 manfred.cejna@univie.ac.at, Loewe, Christian1, Schoder, Maria1, Dirisamer, Albert1, Hölzenbein, Thomas2, Kretschmer, Georg2, Lammer, Johannes1, Thurnher, Siegfried1, Hölzenbein, Thomas (AUTHOR) |
| Source: | European Radiology. Oct2002, Vol. 12 Issue 10, p2443-2450. 8p. |
| Subjects: | Vascular diseases, Magnetic resonance, Angiography, Medical radiography, Surgical stents, Aneurysms |
| Abstract: | Our objective was to evaluate the accuracy of contrast-enhanced 3D MR angiography (MRA) in the follow-up of patients with endoluminally treated aortic aneurysms and correlate these findings with uni- or biphasic CT angiography (CTA). Forty MR angiograms in 32 patients with implanted aortic nitinol stent grafts were compared to CTA. Twenty-two MR examinations were correlated with arterial-phase CTA (uniphasic), and 18 MR examinations were correlated with biphasic CTA. Uniphasic CTA demonstrated three type-1/type-3 endoleaks and four reperfusion (type-2) endoleaks. In addition, MRA depicted two type-2 reperfusion endoleaks that were missed by CTA. Using biphasic CTA, two type-1/type-3 endoleaks and three reperfusion (type-2) endoleaks were detected; of those, delayed scanning detected three reperfusion (type-2) endoleaks missed during arterial-phase CTA. In addition to the findings by CTA, MRA depicted another type-2 reperfusion endoleak. Magnetic resonance angiography is at least as sensitive as uni- or biphasic CTA for detecting endoleaks and may consequently offer advantages in patients with contraindications to iodinated contrast agents. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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