Table 2: Morphology analysis of basilar artery stenosis.

Asymptomatic
() (%)
Symptomatic
() (%)

Eccentric plaque91.7 (22)78.8 (26)0.277
Focal thickening95.8 (23)84.8 (28)0.384
IPH33.3 (8)42.4 (14)0.486
Enhancement45.8 (11)81.8 (27)0.004
Severe stenosis37.5 (9) 33.3 (11)0.745

IPH: intraplaque hemorrhage. Enhancement is a combination of grade 2 and grade 3.