Fig. 1From: Dynamic radiostereometric analysis for evaluation of hip joint pathomechanicsSetup of the radiostereometric equipment. The x-ray tubes were positioned with 20° medio-lateral and 45° cranio-caudal tilt. The calibration box was placed in a 45° angle beneath the hip joint. The FADIR motion is indicated by the numbered arrows: 1) Flexion to 90° 2) adduction to stop 3) internal rotation to stopBack to article page