L spine
What is the angle for the lateral spot view
5-8 degrees caudal
What is our CR doing for the AP sacrum?
15 degrees cephalad, centered 2inches above pubic symphysis.
What is the angle of our CR for an AP SI joint?
30-35 degree cephalic angle.
What is the eye of the Scotty dog?
The pedicle.
What is our CR doing for the AP coccyx?
10 degrees caudal, centered 2inches above the pubic symphisis.
When the pt is in a RPO which SI joint ado we see open?
Left SI joint
What zygapophyseal joint is seen if the pt is in a PA oblique projection.
the one farthest
How many bones make up the coccyx?
3-5 rudimentary vertebrae(usually 4 bones).
What is the rotation for the obliques for SI joints?
25-30 degrees (kick heel out)
Why do we place the lead shield for the lateral and spot views?
To absorb scatter and prevent the AEC from shutting off prematurel.
How many bones make up the sacrum?
Fusion of 5 sacral vertebrae segments into a curved triangle.
Where is the CR centered for the SI obliques?
Centered at the level of the ASIS, 1 inch medial.
why do we flex the pts hips and knees for AP Lspine?
To reduce lumbar lordosis.
Do we prep pt for sacrum coccyx X-ray?
Yes. ordering physician should order a bowel prep because the colon should be free of gas and fecal matter, and urinary bladder shoulder be emptied for this exam.
Why do we do both obliques for SI joints
comparison