A combination of dark-blood and bright-blood images in axial and oblique planes oriented to the aorta allows the detection and characterization of intimal flaps. True and false lumens can be differentiated by patterns of flow and by anatomic features (Figures 35 and 36).185 The false lumen can often be identified on spin-echo images by a
higher intraluminal signal intensity attributable to slower flow and may be characterized by web-like remnants of dissected media