AP Sacrum  

This is an AP View of the sacrum. Since the sacrum is tilted posteriorly, this view is obtained with the x-ray beam directed at a slight angle; from inferior to superior in order to obtain a true AP view of the body of the sacrum. Note this view distorts other bony structures of the pelvis. Compare the appearance of the sacrum on this view to the prior AP views of the pelvis.


Identify the following:

1. sacral ala

2. sacroiliac joint

3. anterior sacral foramen

4. posterior sacral foramen

5. 5 sacral vertebrae

6. sacrococcygeal joint

7. coccyx


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