Where should the central ray be positioned for an anteroposterior (AP) ankle radiograph?

For an anteroposterior (AP) ankle radiograph, the central ray should be directed midway between the malleoli. This positioning is crucial because it ensures that both the tibia and fibula are adequately captured in the radiographic image, allowing for a comprehensive evaluation of the joint and surrounding structures.

Positioning the central ray between the malleoli provides a balanced view of the ankle joint, minimizes distortion, and helps to visualize any potential abnormalities such as fractures or joint effusions more effectively. By centering the beam in this manner, you can achieve optimal imaging of the anatomical features of the ankle, which would be critical for accurate diagnosis and treatment planning.