Where should the central ray be directed for a lateral tibia and fibula radiograph?

For a lateral tibia and fibula radiograph, the central ray should be directed at the mid-shaft of the tibia and fibula. Positioning the central ray in this manner ensures that both the tibia and fibula are captured clearly in their entirety, thus providing an accurate representation of the bones for diagnostic purposes.

Directing the central ray at the mid-shaft allows for optimal visualization of any potential fractures, lesions, or other pathologies that may be present, as this area is typically of greatest clinical interest in radiographic evaluations of these bones. Proper alignment also helps minimize distortion and ensures that the anatomic details are adequately highlighted.

While directing the ray at the knee joint, the ankle joint, or the distal fibula may capture some relevant anatomy, it does not provide the comprehensive view required for effective assessment of both long bones in a lateral projection.