Patient characteristics and frequency of conventional MRI findings
| Characteristic | TR-MRA (n = 15) | FP-MRA (n = 31) | P |
|---|---|---|---|
| Age (median [IQR]) | 57 (54–65) | 66 (56–74) | .152 |
| Male sex (no. [%]) | 9 (60%) | 24 (77%) | .219 |
| Days between DSA and MRA (median [IQR]) | 6 (4–12) | 5 (1–10) | .340 |
| DSA evidence of SDAVF | 10 (67%) | 20 (64%) | .886 |
| Level of fistula identified on DSA | .515 | ||
| C6–C7 | 1 | 0 | |
| T1–T3 | 0 | 0 | |
| T4–T6 | 2 | 4 | |
| T7–T9 | 3 | 4 | |
| T10–T12 | 3 | 3 | |
| L1–L3 | 1 | 4 | |
| L4–L5 | 0 | 1 | |
| Sacrum/pelvis | 0 | 4 | |
| Conventional MR signs in DSA-positive cases | |||
| Cord T2 hyperintensity | 10/10 (100%) | 20/20 (100%) | 1.000 |
| Serpentine flow voids | 10/10 (100%) | 20/20 (100%) | 1.000 |
| Cord enhancement | 9/10 (90%) | 20/20 (100%) | .333 |
Note:—IQR indicates interquartile range.