ARRT Thorax and Abdomen Procedures 4

Question 1

Which oblique position of the sternum projects it to the left of the spine and away from the vertebral column?

Accepted Answer

RAO 15–20°

Answer

The RAO position of 15–20° rotates the sternum to the left, projecting it over the heart shadow and away from the vertebral column.

Question 2

During an esophagram using barium, which position best demonstrates a posterior esophageal impression caused by an aberrant right subclavian artery?

Accepted Answer

Lateral

Answer

An aberrant right subclavian artery (dysphagia lusoria) creates a diagonal posterior impression on the esophagus best seen in the lateral projection.

Question 3

For a lateral chest projection, how much rotation of the patient is considered acceptable on the final image?

Accepted Answer

Posterior ribs must be superimposed within 0.5 cm

Answer

On a true lateral chest, the posterior ribs should be superimposed within 0.5 cm; greater separation indicates rotation and oblique positioning.

Question 4

A kidney-ureter-bladder (KUB) radiograph should include which anatomical landmarks from top to bottom?

Accepted Answer

Upper pole of kidneys to the pubic symphysis

Answer

A KUB must include the upper poles of the kidneys superiorly and the pubic symphysis inferiorly to ensure the entire urinary tract is visualized.

Question 5

Which projection of the ribs above the diaphragm requires the patient to suspend respiration on full expiration?

Accepted Answer

AP ribs above diaphragm — expiration

Answer

Ribs above the diaphragm are imaged on full expiration when evaluating for rib fractures, because expiration elevates the diaphragm and uncovers more of the lower ribs.

ARRT - American Registry of Radiologic Technologists Practice Test

ARRT - American Registry of Radiologic Technologists Practice Test

ARRT Thorax and Abdomen Procedures 4