What is the correct patient position for an anteroposterior (AP) axial projection using the Béclère method of the intercondylar fossa?

For an anteroposterior (AP) axial projection of the intercondylar fossa using the Béclère method, the patient is positioned lying supine. This position allows for optimal alignment of the knee joint and ensures that the X-ray beam can be directed at a specific angle toward the intercondylar fossa, which is located at the distal femur.

In the supine position, the patient's knee is flexed typically to about 40-45 degrees, which assists in projecting the intercondylar fossa clearly and effectively onto the film or digital receptor. This method is designed to minimize distortion and enhance the visibility of the anatomical structures of interest.

Choosing alternative positions such as sitting upright or standing would not facilitate the proper angling of the X-ray beam or provide the necessary visualization of the intercondylar fossa. Lying prone is also inappropriate for this procedure, as it inhibits the required access and appropriate angle for imaging the joint structures being examined. Thus, the supine position is critical for achieving the best possible results in this radiographic technique.