Diagnostic imaging data
| Characteristics | US | % | CT | % | MRI | % |
|---|---|---|---|---|---|---|
| No. of patients | 23 | 49% | 13 | 28% | 43 | 91% |
| No. of carotid arteries | 24 | 49% | 13 | 27% | 45 | 92% |
| Median delay between onset of symptoms and diagnostic exam (days) (IQR) | 5 (3–7.5) | |||||
| High confidence in diagnosis | 24 | 100% | 9 | 69% | 45 | 100% |
| Preferential side of PVI: lateral/medial | 39/10: 3.9 | |||||
| Preferential side of PVI: posterior/anterior | 38/11: 3.5 | |||||
| Localization of PVI: carotid bifurcation | 23 | 96% | 12 | 92% | 41 | 91% |
| Circumferential | 0 | 0% | 0 | 0% | 2 | 4% |
| Percentage of carotid circumference involved (%) (IQR) | 40 (30–40) | 30 (20–40) | 40 (30–57.5) | |||
| PVI | 24 | 100% | 13 | 100% | 45 | 100% |
| Pericarotid fat stranding | 24 | 100% | 13 | 100% | 45 | 100% |
| Lumen caliber narrowing | 9 | 38% | 4 | 31% | 12 | 27% |
| Mean percentage of carotid stenosis (%) (IQR) | 30 (20–30) | 22.5 (18–26) | 20 (14–30) | |||
| Mean PVI span (mm) (IQR) | 15 (10–22) | 15 (10–26) | 28 (17–34) | |||
| Median PVI largest diameter (mm) | 4 (2.4–6) | 4 (3.6–4.8) | 5 (4–7) | |||
| Soft intimal plaque | 14 | 58% | 6 | 46% | 12 | 27% |
| Enlarged lymph nodes | 8 | 33% | 0 | 0% | 8 | 18% |
| PVI enhancement | NA | 11 | 85% | 45 | 100% | |
| Laryngeal or pharyngeal inflammation | 0 | 0% | 0 | 0% | 1 | 2% |
Note:—IQR indicates interquartile range; NA, not applicable.