Number of Studies with Given Direction and Magnitude of Misregistration
| Direction of misregistration | Magnitude of misregistration (pixels) | ||
|---|---|---|---|
| >1 | >2 | >3 | |
| On any axis | 181 (72.9%) | 57 (22.9%) | 10 (4.0%) |
| Most severe direction on any axis* | 152 (61.3%) | 40 (16.1%) | 7 (2.8%) |
| ≥2 axes | 65 (26.2%) | 5 (2.0%) | 0 |
| Most severe direction* ≥2 axes | 3 (1.2%) | 0 | 0 |
↵* In different experiment, caudal, ventral, or right artificial shift of CT was found to induce most severe changes in polar map scoring.
Number in parentheses is percentage of 248 consecutive clinical studies.