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. Author manuscript; available in PMC: 2014 Aug 6.
Published in final edited form as: IEEE Trans Ultrason Ferroelectr Freq Control. 2012 Jan;59(1):174–181. doi: 10.1109/TUFFC.2012.2170

Fig. 3.

Fig. 3

(a) Spatiotemporal variation of the wall velocity in the carotid artery, (c) wall velocity waveforms at three different locations, (b) spatiotemporal variation of the wall acceleration in the carotid artery, and (d) wall acceleration waveforms at three different locations. In (a) and (b), the horizontal axis represents time, whereas the vertical axis represents the longitudinal positions of the artery (from the proximal to the distal regions). The circles indicate the fiduciary point, or foot, of the pulse wave at different longitudinal positions. The linear fitting line near the circles indicates the delay of wall velocities or acceleration due to the pulse wave propagation. The wall velocity or acceleration waveforms in (c) and (d) were taken from the horizontal lines (A, B, and C) indicated in (a) and (b), respectively. The insets in (c) and (d) show the magnified waveforms of the regions indicated by the dashed rectangle.