What is correct for positioning in an AP projection of the lower leg?

In an AP projection of the lower leg, proper positioning is critical to obtain a clear and diagnostic image. The leg should be extended and resting on the imaging receptor (IR). This positioning ensures that both the tibia and fibula are fully visible without foreshortening, which can obscure important anatomical details.

When the leg is extended, it allows the lower leg to be aligned properly within the field of view, helping to minimize distortion and providing a comprehensive representation of the leg structure. Additionally, extending the leg helps to ensure that the knee and ankle joints are included in the radiographic image, which is essential for diagnostic purposes.

The focus on maintaining the leg in a straight position, resting on the IR, is essential as it aligns the long axis of the tibia and fibula with the IR, optimizing the imaging technique and the resultant radiograph quality.