CAMRT Radiography Practice Exam

When observing the radial tuberosity in profile on a lateral elbow, what position is the patient's hand in?

1. Hand positioned with palm flat

2. Hand positioned in a fist

3. Hand positioned with palm facing up

4. Hand karate chopped

The correct answer is: Hand positioned with palm flat

When the radial tuberosity is observed in profile on a lateral elbow radiograph, this positioning indicates that the patient's hand is placed so that the palm is flat against the examination surface. This specific positioning helps to achieve the desired alignment of the forearm and elbow, allowing for the optimal visualization of the radial tuberosity in relation to the humerus and ulna. The radial tuberosity, which is an anatomical landmark on the radius, is positioned medially to the head of the radius. By having the palm flat, the forearm is placed in a neutral rotation that minimizes superimposition of the anatomical structures, thereby making the radial tuberosity clearly visible. Positioning the hand in other ways—such as making a fist, having the palm facing up, or performing a karate chop—would alter the alignment of the radius and ulna and could obscure the view of the radial tuberosity, resulting in a suboptimal radiographic image. Therefore, the flat palm position is essential for accurate assessment and diagnosis in lateral elbow imaging.