A patient comes to radiology for a study of the lumbar spine.The initial radiographs demonstrate potential pathology involving the L5-S1 zygapophyseal joint.Which of the following positions and/or projections would best demonstrate this joint space?

Question

Quizplus · Accepted Answer

30° oblique projections are the best for visualizing the zygapophyseal joint space of L5-S1. This projection opens up the joint space, making it more visible. The lateral position may not show enough detail, and the 50° oblique projections may not provide as clear an image. Closely collimated and lateral position may miss the joint space completely.

A Patient Comes to Radiology for a Study of the Lumbar