What anatomy is demonstrated in this AP oblique projection in the image below?

A) Right SI joint
B) Left SI joint
C) L5-S1 joint space
D) L5-S1 zygapophyseal joint

Question

What anatomy is demonstrated in this AP oblique projection in the image below?

A) Right SI joint 
B) Left SI joint 
C) L5-S1 joint space 
D) L5-S1 zygapophyseal joint

Quizplus · Accepted Answer

This AP oblique projection of the lumbar spine with 25-30 degree cephalic tilt demonstrates the left SI joint. The right SI joint would be demonstrated on the opposite side of the image. The L5-S1 joint space and zygapophyseal joint are not visible in this view.

What Anatomy Is Demonstrated in This AP Oblique Projection in the Image