What is the recommended knee flexion angle for a lateral knee X-ray?

The recommended knee flexion angle for a lateral knee X-ray is 45 degrees. This particular angle is optimal because it provides a clear view of the knee joint structures, including the femoral condyles, patella, and the joint space. At a 45-degree flexion, the positioning helps to reduce any potential overlap between the femur and patella, allowing for better visualization of the joint for diagnostic purposes. This angle also assists in minimizing distortion of the a vascular structures and provides adequate coverage of the entire knee area. Using this specific degree of flexion ensures that the radiographic image captures relevant anatomical details necessary for accurate assessment and diagnosis.