Osteology

Radiograph of sacrum, anteroposterior view

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Image #208-7

Osteology

Radiograph of sacrum, anteroposterior view

1. Base of sacrum
2. Transverse line (remnant of intervertebral disc S. I-II; note similar transverse lines at lower levels of sacrum)
3. Lateral part
4. Sacral hiatus (pointers indicate margins)
5. Apex of sacrum
6. Intervertebral foramen (pointers indicate upper and lower walls of foramen)
7. Articular surface (note dense bone underlying the articular surface for the ilium as well as heavy bony trabeculae passing medially and upward toward base)
8. Middle sacral crest (in background)
9. Pelvic sacral foramen (dorsal sacral foramen visible in background)