What is the correct CR placement for an AP axial projection of the SI joints?

Unlock all questions

This demo includes only 20 questions. Upgrade to access hundreds of questions, flashcards, exam simulations, and disable ads.

Full question bankExam simulationsFlashcards
From $24.99Unlock all

Study for the Clover Learning Radiography Positioning Test. Boost your skills with detailed questions, hints, and explanations. Master your radiography exam!

Multiple Choice

What is the correct CR placement for an AP axial projection of the SI joints?

Explanation:
For an AP axial projection of the sacroiliac joints, the central ray should enter about 1.5 inches superior to the pubic symphysis with a cephalad angle (usually about 30 degrees). This placement positions the beam along the axis of the SI joints, opening the joint spaces and reducing overlap from the pelvis so both SI joints are visible. Centering at the pubic symphysis would be too low and fail to clearly show the SI joints; centering 2 inches above would move the beam too far and risk missing the lower SI joint, while 0 inches would place the projection at the level of the symphysis and again miss the targeted joints.

For an AP axial projection of the sacroiliac joints, the central ray should enter about 1.5 inches superior to the pubic symphysis with a cephalad angle (usually about 30 degrees). This placement positions the beam along the axis of the SI joints, opening the joint spaces and reducing overlap from the pelvis so both SI joints are visible.

Centering at the pubic symphysis would be too low and fail to clearly show the SI joints; centering 2 inches above would move the beam too far and risk missing the lower SI joint, while 0 inches would place the projection at the level of the symphysis and again miss the targeted joints.

More Multiple Choice Questions
Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy