ARRT Upper Extremity Procedures 4

Question 1

Which projection of the elbow is performed when the patient cannot fully extend the arm, requiring two separate images taken in partial flexion?

Accepted Answer

Partial flexion AP method

Answer

When full extension is impossible, two partial flexion AP projections (one centering the distal humerus, one the proximal forearm) are obtained.

Question 2

For the Coyle method of the elbow, imaging the radial head and capitulum requires the CR angled:

Accepted Answer

45° toward the hand

Answer

The Coyle method for the radial head/capitulum uses a 45° distal CR angle with the elbow flexed 90° and externally rotated.

Question 3

A Bennett fracture involves which structure?

Accepted Answer

Base of the first metacarpal (thumb) with carpometacarpal dislocation

Answer

A Bennett fracture is an intra-articular fracture-dislocation at the base of the first metacarpal at the carpometacarpal joint of the thumb.

Question 4

For the PA projection of the wrist, where is the central ray directed?

Accepted Answer

Midcarpal area (midpoint of wrist)

Answer

The CR is directed perpendicular to the midcarpal area (midpoint of the wrist) for the PA wrist projection.

Question 5

The transscapular (scapular Y) lateral projection places the scapular body:

Accepted Answer

Perpendicular to the IR

Answer

In the scapular Y position the patient is rotated so the scapular body is perpendicular to the IR, creating the characteristic Y shape of the scapula.

ARRT - American Registry of Radiologic Technologists Practice Test

ARRT - American Registry of Radiologic Technologists Practice Test

ARRT Upper Extremity Procedures 4