Author Question: In review of the image, what might the technologist consider to acquire a, L5-S1 spot? center with ... (Read 50 times)

kshipps · **on:** Jul 17, 2018

In review of the image, what might the technologist consider to acquire a, L5-S1 spot?

center with a perpendicular beam
provide additional support under the waist
center with a 5-7 degree cephalic tube angle
center with a 5-7 degree caudal tube angle

Question 2

Which projection/position of the shoulder will demonstrate the greater tubercle in profile laterally?

AP internal rotation
AP neutral rotation
AP external rotation
AP oblique

underwood14 · **Reply #1 on:** Jul 17, 2018

Answer to Question 1

center with a perpendicular beam

Rationale: If the lateral lumbar spine image reveals the L5-S1 joint space to be open, then a perpendicular central ray should be directed for the spot image. This image reveals that the patient's spine is parallel to the image receptor; no tube angle is necessary.

Answer to Question 2

AP external rotation

Rationale: Nontrauma imaging of the shoulder routinely uses two AP projections, one with the arm in external rotation and one with the arm in internal rotation. This change in position of the arm shifts visibility of the greater and lesser tubercles.