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Single transverse sections at various levels have been used for determination of femoral anteversion axes. Section B, as described by Weiner et al,55 passes through femoral head and neck but underestimates the true anteversion. Section C, as described by Sugano et al,51 passes just inferior to the femoral head and approximates the true anteversion measurements. The more proximal the section (ie, section A), the greater the underestimation of femoral anteversion.
