Lateral sacrum & coccyx

Question 1

What is the central ray location?

Answer 1

Sacrum: 3.5” posterior to ASIS, level of ASIS
Coccyx: 3.5” posterior to ASIS, 2” inferior to level of ASIS
Both: 3.5” posterior to ASIS, 1” inferior to level of ASIS

Question 2

How can you determine if there is rotation in your image?

Answer 2

Look at hips, make sure everything is superimposed