Fig. 7 Multiplanar reformation of A) noncontrast and B) contrast-enhanced magnetic resonance angiography in a patient with type B aortic dissection. Locations of true (T) and false (F) lumina, as well as the proximal entry site (arrow), are seen with both techniques. Of note, a susceptibility artifact due to metallic sternal wires obscures the ascending aorta in the noncontrast image.