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Example of in vivo contrast-enhanced ultrasound image velocimetry (CFUIV). (a–f) Velocity vector field and wall shear stress (WSS) in the abdominal aorta for different points during the cardiac cycle (I–VI). Graphs below illustrate mean velocity (g) and WSS (h) waveforms. Time stamps I–VI correspond to images (a)–(f). Pink and teal lines represent mean WSS at top (13 mm) and bottom (16 mm) wall with standard error (shading). The blue line represents overall mean WSS.
