ARRT Upper Extremity Procedures 2

Question 1

Which projection of the elbow best demonstrates the radial head free of superimposition?

Accepted Answer

Lateral oblique (external rotation) projection

Answer

The lateral oblique (external rotation) projection rotates the forearm outward to project the radial head free of the ulna.

Question 2

For an AP projection of the humerus, the epicondyles should be:

Accepted Answer

Parallel to the image receptor

Answer

In the AP humerus projection, the epicondyles are parallel to the IR so both the medial and lateral aspects are seen in profile.

Question 3

A Norgaard method (ball-catcher's position) radiograph is primarily used to evaluate:

Accepted Answer

Early rheumatoid arthritis changes in the MCP joints

Answer

The Norgaard (ball-catcher's) position places both hands in partial supination to detect early erosive changes of rheumatoid arthritis at the MCP joints.

Question 4

What is the recommended central ray angulation for the carpal canal (Gaynor-Hart) projection?

Accepted Answer

25–30° toward the fingers

Answer

The carpal canal projection angles the CR 25–30° toward the fingers to project the palmar surface of the carpal bones and tunnel structures.

Question 5

Which carpal bone is most commonly fractured and is best demonstrated in the scaphoid (ulnar deviation) position?

Accepted Answer

Scaphoid

Answer

The scaphoid is the most frequently fractured carpal bone; ulnar deviation elongates it and removes foreshortening for better visualization.

ARRT - American Registry of Radiologic Technologists Practice Test

ARRT - American Registry of Radiologic Technologists Practice Test

ARRT Upper Extremity Procedures 2