. Author manuscript; available in PMC: 2014 Dec 1.

Published in final edited form as: IEEE Trans Ultrason Ferroelectr Freq Control. 2013 Dec;60(12):2471–2487. doi: 10.1109/TUFFC.2013.2847

Table 3.

Number of plaque types and features as determined by the pathologist collapsed according to the dichotomization thresholds (see ‘Statistical Analysis’). Each entry represents the number of image subsections under each rating, with each row totaling 88 (22 arterial FOVs × 4 subsections/FOV), the total number of subsections rated by the pathologist.

Rating Category	True Negatives	True Positives

Plaque Detection	None, Type I - II	Type III – V(a/b/c)^*

	71	17

Collagen	No Plaque Present or Decreased Compared to Average Plaque	Comparable or Increased Compared to Average Plaque

	65	23

IEL	Intact	Degraded

	64	24

Calcium	Not Present	Present

	82	6

Lipid Pool	Not Present	Present

	73	15

Fibrous Cap	Not Present	Present

	73	15

The pathologist could rate up to Type VI plaques, but no arteries in this study developed plaques of this type