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Automated Detection Framework of the Calcified Plaque with Acoustic Shadowing in IVUS Images
Figure 5
The white “×” represents the catheter center.
The region within the yellow closed curve represents the detected calcified plaque. The yellow curve “a” and “b” are the leading edge and the trailing edge of the calcified plaque. The region between 
and 
(two blue dashed lines) represents the angular location of the plaque. AL is angular length of the red dash line. AC is the mean of 
and 
. PA is the area within the yellow closed curve. PT is the mean distance between the curve “a” and the curve “b”. DC is the mean distance between the curve “a” and the catheter center.
doi: https://doi.org/10.1371/journal.pone.0109997.g005