A simple biplanar roentgenographic technique for measurement of femoral
anteversion and neck-shaft angle is described in which no special equipment
is required. An anteroposterior roentgenogram of the pelvis and the femoral
neck is made with the hip in neutral rotation. The true lateral
roentgenogram is made with the patient's limb in a lateral position with
the hip and knee flexed and with the entire lateral aspect of the leg in
contact with the top of the table. Projected cervicofemoral angulations are
measured on the roentgenograms. The method is described to determine the
true angles by dynamically illustrating the projected angles. Graphs have
been prepared with which one can readily determine the anteversion and
neck-shaft angles once the projected cervicofemoral angulations have been
measured.