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Rotational range of motion for assessment of spinal motion by fluoroscopy (medical metrics) versus active marker sensors (Optotrak)
| Motion segment | Fluoro, mean (SD), deg | Optotrak, mean (SD), deg |
|---|---|---|
| L2–L3 | 5.7 (0.9) | 5.4 (0.4) |
| L3–L4 | 6.3 (1.6) | 6.3 (1.6) |
| L4–L5 | 7.9 (2.9) | 7.7 (3.2) |
| L5–S1 | 5.9 (3.4) | 6.4 (3.3) |
| L2–S1 (total) | 25.8 (5.4) | 25.8 (5.5) |
