RAD 245- L5-S1 Lumbosacral Junction- LATERAL- Chapter 9- Module 3

Question 1

Where is the CR centered?

Answer 1

Perpendicular CR at 2 inches Posterior to the elevated ASIS and 1.5 inches Inferior to the Illiac Crest

Question 2

What is evident when neither the greater sciatic notches are superimposed and the femoral heads are not aligned (one is demonstrated anterior to the other)?

Answer 2

Rotation

Question 3

When rotation is evident, what is the most common side that is rotated on this projection?

Answer 3

The side positioned farthest from the IR is rotated anteriorly

Question 4

What type of projection demonstrates the pelvic alae without superinferior alignment and a closed L5-S1 joint space?

Answer 4

A laterally flexed projection

Question 5

What is the error when the L5-S1 intervertebral disk space is CLOSED and the L5 vertebral body is distorted?

Answer 5

The lumbar vertebral column was sagging toward the table