TABLE 2.
Anatomical positions of all landmarks placed
| Unpaired landmarks | Paired landmarks | Semilandmarks (no. of landmarks) |
|---|---|---|
| Promontory | Lateral point of S1 body | Alar‐auricular ridge curvature (19) |
| S1 Center | Lateral alar‐auricular point | Obturator foramen (23) |
| Third sacral segment union point | Inferior sacro‐iliac junction | Acetabulum curvature (20) |
| Fourth sacral segment union point | Superior articular facet: medial superior corner | Pelvic inlet curvature (38) |
| Sacral canal, anterior floor | Superior articular facet: medial inferior corner | Greater sciatic notch curvature (18) |
| Sacral canal, anterior roof | Superior articular facet: lateral inferior corner | Ischial tuberosity curvature (18) |
| Sacral canal, posterior roof | Posterior superior iliospinale | Lateral iliac crest (38) |
| Dorsal spine of S1 | Obturator tubercle point | Medial iliac crest (38) |
| Dorsal spine of S2 | Superior anterior pubic symphysis | |
| Superior posterior pubic symphysis | ||
| Pubotubercle point | ||
| Pubic eminence point | ||
| Anterior inferior iliospinale | ||
| Anterior acetabulion | ||
| Inferior acetabulion | ||
| Center point of acetabulion | ||
| Bouisson Tubercle point | ||
| Superior ischial tuberosity point | ||
| Ischiale |