Fig. 4

Quantification of aortic wall characteristics. Schematic representation of quantification of descending thoracic aortic wall characteristics. The aortic lumen and outer contours are manually traced. a represents a graphic illustration of tracing of the inner and outer contour as well as a thickness measurement. b represents an in vivo example of a traced transversal image of the descending thoracic aorta (non-contrast enhanced). c represents the definitions and quantification methods of the studied aortic wall characteristics