Beak sign of aortic dissection (annotated image)
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The beak sign is a cross-sectional imaging feature that is helpful in differentiating the true and false lumens in aortic dissections. This feature is seen in the false lumen which wedges around the true lumen. The wall of the false lumen and the intimal flap usually form acute angles resembling a bird’s beak.
- 1. LePage MA, Quint LE, Sonnad SS et-al. Aortic dissection: CT features that distinguish true lumen from false lumen. AJR Am J Roentgenol. 2001;177 (1): 207-11. doi:10.2214/ajr.177.1.1770207 - Pubmed citation
- 2. Moullet P, Mann H. Beak sign. J Thorac Imaging. 2014;29 (6): W90. doi:10.1097/RTI.0000000000000098 - Pubmed citation