Table 3. Magnetic resonance imaging characteristics of 23 patients with multiple sclerosis.
| Characteristic mean (range) | Scan | Patients (N=23; 17 females) | Spearman's correlation with mean cortical OEF | Uncorrected P value |
|---|---|---|---|---|
| Cortical thickness (mm) | 3 T | 2.4 (2.2–2.6) | 0.41 | 0.05 |
| Thalamic volume (mm3) | 3 T | 13767 (10837–17942) | −0.01 | 0.98 |
| WM lesion volume (mm3) | 7 T | 2232 (64–15718) | −0.34 | 0.12 |
| Deep GM lesion volume (mm3) | 7 T | 92 (3–258) | −0.08 | 0.73 |
| Type-I lesion count (N) | 7 T | 5.5 (0–42) | −0.17 | 0.47 |
| Type-II lesion count (N) | 7 T | 0.14 (0–2) | — | — |
| Type-III/IV lesion count (N) | 7 T | 15.4 (0–41) | −0.33 | 0.15 |
| Total cortical lesion count (N) | 7 T | 21.1 (0–82) | −0.32 | 0.16 |
GM, gray matter; OEF, oxygen extraction fraction; WM, white matter; 3 T, 3 Tesla; 7 T, 7 Tesla.