In proximal femur positioning, which direction must the midline be in relation to the neck box?

In proximal femur positioning, the midline must be perpendicular to the neck box. This alignment is crucial because it ensures accurate imaging of the femoral head, neck, and greater trochanter, which are important anatomical landmarks. When positioned perpendicular, the geometric relationships between these structures are maintained, allowing for improved clarity and detail in the resulting images.

When the midline is perpendicular to the neck box, it helps avoid distortion that can occur if the alignment is parallel or at an inappropriate angle. Maintaining this perpendicular orientation is vital for assessments such as identifying fractures, evaluating bone density, and planning surgical interventions. Correct positioning directly impacts the diagnostic quality of radiological images, emphasizing the importance of precision in technique.