Imaging characteristics
| Characteristics | All patients | New DWI lesions after CAS | No DWI lesions after CAS | P value |
| 100% (110/110) | 7.3% (8/110) | 92.7% (102/110) | ||
| Degree of stenosis %, median (range) | 80 (70–90) | 90 (80–90) | 80 (70–90) | 0.271 |
| Length of stenosis in mm, median (range) | 10 (2–30) | 12 (6–22) | 10 (2–30) | 0.208 |
| Ultrasound plaque classification score* | 0.501 | |||
| Gray-Weale 1 | 25.2% (27/107) | 7.4% (2/27) | 92.6% (25/27) | |
| Gray-Weale 2 | 21.5% (23/107) | 4.3% (1/23) | 95.7% (22/23) | |
| Gray-Weale 3 | 29.0% (31/107) | 12.9% (4/31) | 87.1% (27/31) | |
| Gray-Weale 4 | 24.3% (26/107) | 3.8% (1/26) | 96.2% (25/26) | |
| Carotid plaque morphology* | 0.306 | |||
| Anechoic/hypoechoic | 25.2% (27/107) | 7.4% (2/27) | 92.6% (25/27) | |
| Heterogeneous, predominantly hypoechoic | 23.4% (25/107) | 4.0% (1/25) | 96.0% (24/25) | |
| Predominantly hyperechoic | 51.4% (55/107) | 9.1% (5/55) | 90.9% (50/55) | |
| Additional ulceration* | 15.9% (17/107) | 5.9% (1/17) | 94.1% (16/17) | 1 |
| MRI preprocedural | 1 | |||
| White matter grading 0–2 | 75.5% (83/110) | 7.2% (6/83) | 92.8% (77/83) | |
| White matter grading 3–8 | 24.5% (27/110) | 7.4% (2/27) | 92.6% (25/27) | |
| MR presence of chronic infarction | 1 | |||
| No chronic infarction | 78.2% (86/110) | 8.1% (7/86) | 91.9% (79/86) | |
| Chronic infarction | 21.8% (24/110) | 4.2% (1/24) | 95.8% (23/24) | |
| MR presence of fresh ischemic lesion preprocedural | 30% (33/110) | 9.1% (3/33) | 90.9% (30/33) | 0.204 |
↵*Ultrasound was not performed in three patients.
CAS, carotid artery stenting.