Table I.
Mean errors ± SD for consecutive stages of the coregistration procedures using the moment and least‐squares method for the initial guessa
| Coregistration procedure | Initial fit | |
|---|---|---|
| Moment | Least‐squares | |
| Target registration error (TRE) | ||
| Initial fit | 47.1 ± 4.7 | 8.7 ± 2.7 |
| Surface | 25.8 ± 32.6 | 4.9 ± 0.5 |
| Scaling | 25.1 ± 32.5 | 4.6 ± 0.4 |
| Scalp forcing | 25.0 ± 32.9 | 4.4 ± 0.6 |
| Fiducial registration error (FRE) | ||
| Initial fit | 59.8 ± 10.3 | 3.8 ± 1.6 |
| Surface | 24.4 ± 28.5 | 6.8 ± 1.9 |
| Scaling | 23.7 ± 28.1 | 6.7 ± 1.7 |
| Scalp forcing | 21.9 ± 26.3 | 5.9 ± 1.4 |
| Residual error (RE) | ||
| Initial fit | 13.2 ± 1.5 | 2.8 ± 0.6 |
| Surface | 3.9 ± 3.6 | 1.6 ± 0.1 |
| Scaling | 3.5 ± 3.4 | 1.4 ± 0.1 |
| Scalp forcing | 0.0 ± 0.0 | 0.0 ± 0.0 |
a
Three assessments of error are reported.