Assessment of interval changes of specific MR imaging findings at follow-up MR imaging compared with baseline MR imaging
| (n = 33)* | Improved | Equivocal | Worse | Findings Absent at Baseline and Follow-Up MRI |
|---|---|---|---|---|
| Disk space enhancement | 4 (13) | 11 (34) | 12 (38) | 5 (16) |
| T2 disk space signal | 14 (42) | 11 (33) | 5 (15) | 3 (9) |
| Epidural enhancement | 21 (66) | 5 (16) | 3 (9) | 3 (9) |
| Epidural canal abscess | 15 (47) | 1 (3) | 1 (3) | 15 (47) |
| Paraspinal inflammation | 16 (50) | 8 (25) | 4 (13) | 4 (13) |
| Bone marrow edema | 3 (9) | 22 (67) | 7 (21) | 1 (3) |
| Vertebral body enhancement | 8 (24) | 18 (55) | 6 (18) | 1 (3) |
Note:—Values represent No. (%).
* One patient did not receive contrast on the follow-up MRI, and therefore was not included in the evaluation of epidural, paraspinal, and disk space enhancement changes.