ARRT Spine and Pelvis Procedures 3

Question 1

On an AP projection of the pelvis, proper rotation is confirmed when:

Accepted Answer

Both iliac wings appear equal in size and the obturator foramina are symmetric

Answer

Symmetric iliac wings and equal obturator foramina indicate no rotation on an AP pelvis projection.

Question 2

The Towne method for the sacrum requires the patient to be supine with the CR directed:

Accepted Answer

30-40 degrees cephalad

Answer

For an AP axial (Towne-type) projection of the sacrum, the CR is angled 30-40 degrees cephalad to project the sacrum through the pelvis.

Question 3

Which projection is best suited to demonstrate a spondylolisthesis of the lumbar spine?

Accepted Answer

Lateral projection

Answer

The lateral projection of the lumbar spine best demonstrates anterior or posterior displacement of one vertebra on another (spondylolisthesis).

Question 4

The acetabulum is best demonstrated with which projection?

Accepted Answer

Judet method (anterior and posterior obliques)

Answer

The Judet method uses 45-degree anterior and posterior oblique projections to demonstrate the anterior and posterior columns of the acetabulum.

Question 5

For the lateral projection of the lumbar spine, the patient's hips and knees should be:

Accepted Answer

Flexed slightly to reduce lordosis

Answer

Flexing the hips and knees flattens lumbar lordosis and places the long axis of the spine parallel to the IR for a true lateral.

ARRT - American Registry of Radiologic Technologists Practice Test