Table 2 Characteristics of intracranial and extracranial plaques on MR images
|  | Mean ± SD or N (%) | Range |
|---|---|---|
Intracranial artery | ||
 Maximum wall thickness, mm | 2.3 ± 0.7 | 1.1–3.5 |
 Length, mm | 8.6 ± 3.6 | 2.9–18.5 |
 Stenosis, % | 27.6 ± 13.9 | 2.2–68.3 |
 Presence of calcification | 17 (17.9) |  |
 Presence of lipid-rich necrotic core | 43 (45.3) |  |
 Presence of intraplaque hemorrhage | 15 (15.8) |  |
Extracranial carotid artery | ||
 Maximum wall thickness, mm | 3.6 ± 1.1 | 2.2–8.0 |
 Length, mm | 13.2 ± 6.1 | 4.5–31.8 |
 Stenosis, % | 19.4 ± 17.3 | 0–100 |
 Presence of calcification | 30 (26.3) |  |
 Presence of lipid-rich necrotic core | 80 (70.2) |  |
 Presence of intraplaque hemorrhage | 18 (15.8) |  |