From: Quantitative comparison between carotid plaque hardness and histopathological findings: an observational study
Plaque Hardness (MPa)
4.0 ± 4.4 (0.13–31.8)
Gray scale median
175.7 ± 16.7 (131.7–219.2)
Calcification
 0
28
 1
38
 2
23