Table 1.
Landmark errors in millimeters between RSA and CT data and between RSA double examinations after rigid body fitting. For the RSA double examinations markers with an error of the rigid body fitting above 0.35 mm are excluded automatically by the software. This is not the case for the comparison between RSA and CT.
| Volume | Mean error | Median | Standard deviation | Minimum | Maximum | 95% confidence interval |
|---|---|---|---|---|---|---|
| RSA-CT | ||||||
| Markers in bone | 0.27 | 0.22 | 0.17 | 0.02 | 1.50 | 0.00–0.61 |
| Markers in prosthesis | 0.22 | 0.18 | 0.16 | 0.04 | 1.08 | 0.00–0.53 |
| RSA1-RSA2 (double examination) | ||||||
| Markers in bone | 0.09 | 0.07 | 0.06 | 0.02 | 0.26 | 0.00–0.20 |
| Markers in prosthesis | 0.11 | 0.09 | 0.06 | 0.02 | 0.26 | 0.00–0.24 |