Figure 4.

Preoperative computed tomography angiography image (a) demonstrated the renal malperfusion of a three-channeled aortic dissection at the area of the origin of right renal artery. Intravascular ultrasound images before (b) and after (c) thoracic endovascular aortic repair at the same area showed the changes in the three channels and the natural branch flow (T) at the origin of the right renal artery. They also confirmed enlargement of and return of pulsatile flow to the true lumen with stagnation of flow in the false lumen (F1 and F2).