CAMRT Radiography Practice Exam

How can one determine if the hand and wrist were in a true lateral position when viewing a lateral projection of the elbow?

1. The radial tuberosity will point anteriorly

2. The olecranon will be in profile

3. The humerus will appear symmetrical

4. The wrist joint will be closed

The correct answer is: The radial tuberosity will point anteriorly

When assessing whether the hand and wrist are in a true lateral position while viewing a lateral projection of the elbow, the radial tuberosity's position is key. In a true lateral position, the radial tuberosity will point anteriorly. This indicates that the forearm has been properly rotated, allowing accurate alignment of the bones. In a true lateral view, the forearm should not be pronated or supinated; instead, the radial and ulnar bones should be parallel. If the radial tuberosity is correctly oriented to face forward (anteriorly), it affirms that the wrist and hand are positioned adequately in lateral view, supporting proper visualization and positioning for diagnostic evaluation of the elbow. Other factors like the profile of the olecranon or the appearance of the humerus may indicate positioning, but they do not specifically confirm the position of the hand and wrist as effectively as the orientation of the radial tuberosity. Similarly, the closure of the wrist joint is not a definitive indicator of a true lateral position, as various factors could influence joint openness irrespective of forearm rotation.