What is the appropriate angle for the AP axial projection when radiographing a supine patient with a clavicle injury?

The appropriate angle for the AP axial projection when radiographing a supine patient with a clavicle injury is 15-30 degrees cephalad. This angle helps to project the clavicle away from the thoracic cavity, effectively minimizing superimposition and providing a clearer view of the bone structure. By angling the tube cephalad within this range, it achieves optimal visualization of the clavicle in its anatomical position, allowing for accurate assessment of any fractures or abnormalities.

In certain instances, an angle below 15 degrees cephalad may not provide the necessary separation from the thorax, leading to difficulties in interpretation. Conversely, an angle that exceeds 30 degrees could unduly distort the image, making it less effective for assessment. Therefore, the 15-30 degree range is essential for maintaining the balance between clarity and anatomical fidelity in radiographic evaluation of the clavicle.