For AP projection, where is the CR?
Illiac Crest Line.
For AP L5 - S1, where is the CR? How much do you angle?
Direct 30-35 degrees cephalad level of asis.
Where is the CR for an oblique projection?
2 inch medial to the upside of asis and 1 1/2 inch above crest.
What does the oblique proejction show?
Spophyseal joints closest to he film and scotty dog.
For lateral, where is the CR?
At the level of illiac crest (L4-L5)
For 11x14, 1 1/2 nch above illiac crest.
What do you see in a lateral projection?
opens up the intervertebral foramina.
Where is the CR for a lateral L5-S1?
CR 1 1/2 inch below crestand 2 inches posterior to asis.