Contrast between the scar and recurrent disk fragment after IV injection of ionic and nonionic contrast media
| Type of Contrast Medium | Contrast (SI scar/SI disk) at Time after Injection (min) | ||||
|---|---|---|---|---|---|
| 0 | 5 | 25 | 40 | 50 | |
| Ionic | 1.32 ± 0.42 | 1.95 ± 0.80 | 1.66 ± 0.67 | 1.40 ± 0.42 | 1.32 ± 0.41 |
| Nonionic | 1.37 ± 0.61 | 1.93 ± 0.78 | 1.54 ± 0.44 | 1.30 ± 0.44 | 1.20 ± 0.56 |
Note.—SI indicates signal intensity.
* Contrast between scar and recurrent disc fragment is expressed as arithmetic mean ± SD (n = 20).