ARRT Thorax and Abdomen Procedures 3

Question 1

When performing an AP projection of the chest on a supine trauma patient, how should the IR be positioned relative to the patient?

Accepted Answer

Perpendicular to the long axis, centered at T7

Answer

For a supine AP chest, the IR is centered at T7 with the central ray perpendicular to the IR to minimize distortion of the mediastinal structures.

Question 2

A patient with suspected right middle lobe pneumonia would be best evaluated with which additional view beyond the standard PA and lateral chest?

Accepted Answer

Right anterior oblique

Answer

The right anterior oblique (RAO) rotates the right lung forward, separating the middle lobe from overlapping structures and improving its visualization.

Question 3

The AP axial (lordotic) projection of the chest is obtained by angling the central ray how many degrees cephalad when the patient stands upright?

Accepted Answer

15–20°

Answer

A 15–20° cephalad angle (or equivalent patient lean-back) projects the clavicles above the lung apices, revealing the apical lung zones.

Question 4

For an upper GI series, which position places the duodenal bulb in profile and best demonstrates a posterior duodenal ulcer?

Accepted Answer

Right lateral

Answer

The right lateral position places the duodenal bulb in a true lateral projection, profiling the anterior and posterior walls to demonstrate posterior ulcers.

Question 5

On an AP abdomen (KUB) radiograph, which organ's shadow is normally visible in the right upper quadrant?

Accepted Answer

Liver (hepatic shadow)

Answer

The hepatic shadow (liver) is routinely visible as a homogeneous soft-tissue density occupying the right upper quadrant on an AP abdomen.

ARRT - American Registry of Radiologic Technologists Practice Test

ARRT - American Registry of Radiologic Technologists Practice Test

ARRT Thorax and Abdomen Procedures 3