What type of CR angle is required for the AP semiaxial projection for the lung apices?

Question

Quizplus · Accepted Answer

The CR angle required for the AP semiaxial projection for the lung apices is 15° to 20° caudal. This angle helps to open up the apices and separates the clavicles from the lung fields, which improves visualization of the apical regions of the lungs. A CR angle less than 15° would not open up the apices enough, and a CR angle greater than 20° may cause the clavicles to overlap with the apices, obscuring the anatomy.

What Type of CR Angle Is Required for the AP