A less than optimal lateral elbow projection demonstrating the capitulum posterior to the medial trochlea will
A) also demonstrate the coronoid proximal to the radial head.
B) be obtained when the distal forearm is elevated.
C) also demonstrate the medial trochlea proximal to the capitulum.
D) be obtained when the distal humerus is elevated.

Question

Quizplus · Accepted Answer

The positioning error of having the capitulum posterior to the medial trochlea in a lateral elbow projection can be caused by elevating the distal forearm or having the elbow flexed too much. It will not demonstrate the coronoid proximal to the radial head, and it is unlikely to show the medial trochlea proximal to the capitulum. Elevating the distal humerus would not cause this positioning error.

A Less Than Optimal Lateral Elbow Projection Demonstrating the Capitulum