Lumbar positioning

Question 1

Routine views for lumbar spine

Answer 1

AP, Oblique (LPO and RPO), lateral, L5-S1 spot

Question 2

SID for lumbar spine

Answer 2

40 - 46 (depending on thickness of patient)

Question 3

AP lumbar supine leg position and why?

Answer 3

Knees and hips flexed - to bring spine closer to IR, reduce the lordotic gap and make patient more comfortable

Question 4

CR for ap lumbar

Answer 4

level of the iliac crest (bellybutton)

Question 5

Evaluation criteria for AP lumbar

Answer 5

T12-S1 included, collimation to include the SI joints

Question 6

CR for oblique lumbar

Answer 6

1-2 inches above iliac crest

Question 7

Evaluation criteria for oblique lumbar

Answer 7

L1-S1 clearly viewed, Z-joints, pedicle near center of vertebral body,

Question 8

CR for lateral lumbar

Answer 8

level of iliac crest

Question 9

Evaluation criteria for lateral l-spine

Answer 9

T12 to distal sacrum demonstrated, intervertebral disk space open, intervertebral foramina open

Question 10

CR for lateral L5-S1 spot shot

Answer 10

1 1/2 inches inferior to iliac crest and 2 inches posterior to asis

Question 11

Evaluation criteria for L5-S1 lateral

Answer 11

L5 and S1 demonstrated and centered, joint space open

Question 12

Which projection of the lumbar spine demonstrates the scottie dog?

Answer 12

oblique

Question 13

Structure represented by neck of scottie dog.

Answer 13

Pars Interarticularis

Question 14

Which portion of the vertebral arch is situated between the body and transverse process of lumbar vertebrae?

Answer 14

Pedicle