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Figure 15a.   Type B thoracic aortic dissection. (a, b) Oblique sagittal (a) and coronal (b) 3D partitions show a dissection flap with entry (arrow in b) and reentry (arrow in a) points. (c-e) Targeted coronal (c, d) and targeted oblique sagittal (e) MIP images show the proximal and distal aspects of the dissection and its relationship to the abdominal aortic tributaries. The flap extends to the celiac artery (arrow).