Fig 1.
The GSM and AUCPDC of representative image of plaque.
(a) Representative image of plaque; (b) When the orange area is 0.5, the horizontal coordinate value is GSM of the plaque illustrated in (a); (c) the shaded areas are the AUCPDC of the plaque illustrated in (a). Note that GSM = gray-scale median; AUCPDC = area under cumulative probability distribution curve.
Table 1.
Baseline characteristics of 72 patients.
Table 2.
Visual classification of 130 carotid plaques by two experienced sonographers.
Fig 2.
The AUCPDC of representative echoluent, intermediate and echo-rich plaques.
The echoluent, intermediate and echo-rich plaques in (d) were defined in the original images (a), (b) and (c), respectively. Note that AUCPDC = area under cumulative probability distribution curve.
Fig 3.
Receiver operating characteristic curves of identifying echolucent plaques for KNN classifier using AUCPDC and GSM.
Note that AUC = area under the curve; GSM = gray-scale median; AUCPDC = area under cumulative probability distribution curve.
Table 3.
Classification of 125 carotid plaques based on GSM.
Table 4.
Classification of 125 carotid plaques based on AUCPDC.
Fig 4.
Scatterplot of the average AUCPDC against the AUCPDC difference for 45 plaques analyzed at 2 different times within a 2-month period by one operator.
Note that AUCPDC = area under cumulative probability distribution curve.
Table 5.
Spearman's rank correlation between the GSM, AUCPDC and the status of hypertension, diabetes, CHD.
Fig 5.
A comparison between AUCPDC with GSM when the probability density curve is changed.
Note that GSM = gray-scale median; AUCPDC = area under cumulative probability distribution curve.