Magnetic Resonance Imaging

In the last decade, MRI has reached a level of development that allows it to be considered the most powerful tool in the diagnostic process of aortic diseases. Images obtained in a modern MRI scanner, in fact, give morphologic and functional information with high diagnostic accuracy of thoracic and abdominal aorta, as well as of its main branches. The combination of the different kinds of images obtainable leads to a comprehensive evaluation of histopathol-

Figure 11.12. CT is very helpful in the follow-up of aortic dissections treated by endovascular techniques. In this example, an endoleak can be visualized after the deployment of a stent graft in the descending aorta, represented by contrast enhancement within the thrombosed sac and outside the graft lumen ((a), axial scan, arrows). The endoleak is caused by the incomplete anchorage of the stent graft at the level of the distal neck ((b), MIP reconstruction on coronal plane, arrows). Therefore, an extended cuff is positioned percutaneously at the distal level. CT control performed after 1 month shows the adequate fixation of the stent graft and of the cuff to the aortic wall ((c), MIP reconstruction on sagittal plane); the endoleak is no longer visualized ((d), axial scan).

Figure 11.12. CT is very helpful in the follow-up of aortic dissections treated by endovascular techniques. In this example, an endoleak can be visualized after the deployment of a stent graft in the descending aorta, represented by contrast enhancement within the thrombosed sac and outside the graft lumen ((a), axial scan, arrows). The endoleak is caused by the incomplete anchorage of the stent graft at the level of the distal neck ((b), MIP reconstruction on coronal plane, arrows). Therefore, an extended cuff is positioned percutaneously at the distal level. CT control performed after 1 month shows the adequate fixation of the stent graft and of the cuff to the aortic wall ((c), MIP reconstruction on sagittal plane); the endoleak is no longer visualized ((d), axial scan).

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