RAD 372 CH 9 Sacrum/Coccyx

5

how much fused vertebrae are on the sacrum?

4

how many sets of sacral foramen are there?

3-5

how much fused segments of the coccyx?

AP, Lateral

what is the routine when imaging the sacrum/coccyx?

75-90

how much kV do we use when imaging the sacrum/coccyx?

supine

when doing an AP sacrum, how do we want to position the patient?

15 degrees cephalad

what kind of tube angle do we want when doing an AP sacrum?

between ASIS and pubic symphysis , mid sagittal, 2" superior to pubic symphysis

where do we want the CR to be when doing an AP sacrum?

true lateral, knees bent

when doing a Lateral sacrum, how do we want to position the patient?

level of ASIS, 3-4" posterior to ASIS

when doing a lateral sacrum, where do we want the CR to be?

complete superimposition of sciatic notches

how do we know if there is no rotation when doing a Lateral sacrum?

supine

when ding an AP coccyx, how do we want to position the patient?

10 degrees caudal

when doing an AP coccyx, what kind of tube angle do we want?

2" superior to symphysis pubis, mid sagittal, 2" below ASIS

when doing an AP coccyx, where do we want the CR to be?

to remove superimposition of the symphysis pubis and distort the sacrum

why do we do a 10 degree caudal angle for an AP coccyx?

flatten out sacrum since it is curved

why do we do a 15 degree cephalad tube angle for an AP sacrum?