Table 2.

Plaque characteristics using standard Doppler ultrasound, IPN assessment using SMI (N=29).

Degree of stenosis	50-69% >70%	6 (20.7) 23 (79.3)
Plaque echogenicity	Predominantly hypoechoic Predominantly hyperechoic	11 (37.9) 18 (62.1)
SMI-count, quantitative a		4.5 (4.4)
IMVF signal on SMI, visual semiquantitative scale	No IPN Moderate IPN Extensive IPN	6 (20.7) 9 (31) 14 (48.3)

Data are given as number (percentages) or ^a mean (SD). IMVF, Intraplaque microvascular flow. IPN, Intraplaque neovascularization.