Number of carotid arteries displaying MPRAGE high and low signal intensity according to interval between repeat and the preceding MRI, and signal intensity change on repeat MRI
| Interval | Number on Preceding MRI | Number Associated with Signal Intensity Change on Repeat MRI | ||
|---|---|---|---|---|
| High | Low | High to Low | Low to High | |
| <90 days | 5 | 9 | 1 | 0 |
| 90–179 days | 8 | 7 | 0 | 1 |
| 180–364 days | 9 | 8 | 0 | 0 |
| ≥ 365 days | 8 | 16 | 0 | 3 |
| Total | 30 | 40 | 1 | 4 |