Long leg standing and leg length views

Why they are ordered

A long leg standing view, also called a hip-to-ankle or full-length alignment view, shows both whole legs on one standing image. Surgeons use it to measure the mechanical axis, the line from the center of the hip through the knee to the ankle. It guides knee replacement and osteotomy planning, and it measures bowed legs, genu varum, knock knees, genu valgum, and differences in leg length.