Table 1:

Plaque characteristics

	Culprit (n = 36)	Nonculprit (n = 44)	P Values
Plaques (%) (No.)
MCA	50 (18)	40.9 (18)
ICA	13.9 (5)	20.5 (9)
ACA	0	13.6 (6)
Basilar artery	19.4 (7)	4.5 (2)
PCA	2.8 (1)	20.5 (9)
VA	13.9 (5)	0 (0)
Morphology
Concentric (%) (No.)	72 (26)	20 (9)	<.001^{^a}
Stenosis (%) (mean)	46 (SD, 21)	31 (SD, 15)	.001^{^a}
PB (%) (mean)	85 (SD, 13)	65 (SD, 14)	<.001^{^a}
RI (mean)	0.37 (SD, 0.27)	0.65 (SD, 0.22)	<.001^{^a}
Area of stenosis (%) (mean)	64 (SD, 24)	35 (SD, 22)	<.001^{^a}
IPH (%) (No.)	11 (4)	0 (0)	.025^{^a}
Enhancement
Mean enhancement ratio plaque^{^b}	0.80 (SD, 0.30)	0.61 (SD, 0.17)	.004^{^a}
Plaque enhancement variance	0.33 (SD, 0.13)	0.26 (SD, 0.08)	.041^{^a}
Gd uptake	2.01 (SD, 0.91)	1.06 (SD, 0.76)	<.001^{^a}
Mean enhancement ratio parent vessel^{^b}	0.59 (SD, 0.20)	0.62 (SD, 0.14)	.62
Plaque vs arterial enhancement	0.99 (SD, 0.94)	–0.02 (SD, 0.48)	<.001^{^a}

Note:—ACA indicates anterior cerebral artery; PCA, posterior cerebral artery; VA, vertebral artery.
↵a P < .05.
↵b Reported as mean SI.