Figure 3From: Characterization of vascular strain during in-vitro angioplasty with high-resolution ultrasound speckle trackingMagnified histologic image of artery 1. The region of interest is the tunica media (a). Fibers within this portion of the artery are naturally folded, each following a variable path. The paths of ten fibers were traced in black (b) and lines connecting the origin and endpoint of each path were drawn. The ratio of path length to line length was used to calculate arterial path length.Back to article page