CT
There is evidence of a type B aortic dissection with intimal flap starting at the aortic arch extending to involve the junction with the descending aorta, and the descending aorta downward to reach the bifurcation and beyond that to the right common iliac artery without significant aneurysmal dilatation.
The celiac trunk, superior mesenteric, and both renal arteries are seen arising from the true lumen and not involved.
Both false and true lumens appear to have a flow in them, but with less flow in the false lumen.
There are no signs of leakage.