In an axiolateral projection (Coyle method), which anatomical structure should be clearly visible when demonstrating the coronoid process of the ulna?

In the axiolateral projection (Coyle method) used to visualize the coronoid process of the ulna, the trochlea should be clearly visible. This projection is designed to provide a specific view that enhances the demonstration of the ulna's coronoid process in relation to the surrounding bony structures. The trochlea, being an important part of the humerus that articulates with the ulna, helps to provide context for the position and orientation of the coronoid process during the imaging process.

By clearly visualizing the trochlea, it establishes a critical landmark for understanding the anatomy and pathologies that may involve the coronoid process. This projection effectively differentiates the ulna's coronoid process from adjacent structures, allowing for a better diagnostic evaluation. The visibility of the trochlea in this projection is essential for radiologists and clinicians as they assess elbow injuries or conditions affecting the ulna and its articulations.