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A line drawing demonstrates measurement of femoral version from the MR arthrogram. Reprinted with permission by the Radiological Society of North America from Sutter R, Dietrich TJ, Zingg PO, Pfirrmann CWA. Femoral antetorsion: comparing asymptomatic volunteers and patients with femoroacetabular impingement. Radiology. 2012;263:475–483.
