A lateral elbow projection obtained with the distal forearm positioned too low and the proximal humerus positioned too high demonstrates the
1)radial head distal and posterior to the coronoid process.
2)radial head proximal and anterior to the coronoid process.
3)capitulum posterior and proximal to the medial trochlea.
4)capitulum anterior and distal to the medial trochlea.
A) 1 and 3 only
B) 1 and 4 only
C) 2 and 3 only
D) 2 and 4 only

Question

Quizplus · Accepted Answer

When the distal forearm is positioned too low and the proximal humerus is positioned too high in a lateral elbow projection, the radial head will appear distal and posterior to the coronoid process (option 1). The capitulum will also appear anterior and distal to the medial trochlea (option 4). Therefore, the correct answer is B (1 and 4 only). Options 2 and 3 are incorrect because they do not match the expected changes in positioning.

A Lateral Elbow Projection Obtained with the Distal Forearm Positioned