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Fig. 2 | BMC Musculoskeletal Disorders

Fig. 2

From: Increased lateral and medial femoral posterior radius ratios are risk factors for anterior cruciate ligament injury

Fig. 2

The sagittal imaging plane showing the measurements. a Sagittal imaging plane of the medial femoral condyle. b Sagittal imaging plane of the lateral femoral condyle. The long axis of the femoral shaft is determined by a line through the centres of two circles centred on the femoral shaft. The best fit circle to the posterior curvature of the femoral condyle determines the lateral femoral posterior radius (LFPR) and medial femoral posterior radius (MFPR) (blue line). A line passing through the centre of the posterior circle and perpendicular to the long axis of the femoral shaft determines the lateral femoral anteroposterior diameter (LFAP) and medial femoral anteroposterior diameter (MFAP) (red line). The distance from the intersection of these lines to the distal femur determines the lateral height of the distal femur (LH) and the medial height of the distal femur (MH) (green line)

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