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. Author manuscript; available in PMC: 2014 Mar 25.
Published in final edited form as: Sports Med Arthrosc Rev. 2012 Sep;20(3):171–180. doi: 10.1097/JSA.0b013e31826a1d37

Figure 6.

Figure 6

Lateral trochlear index. To calculate the lateral femoral condyle index, a perpendicular is drawn to the line denoting the Ca. The distance between this perpendicular and point 1 is divided by the distance between the perpendicular and point 2 and is expressed as a percentage. C1 indicates proximal circle in the femoral shaft; C2, distal circle in the femoral shaft; Ca, central axis of femur; 1, superior most aspect of anterior cartilage of the lateral condyle; 2, superior most aspect of posterior cartilage of the lateral condyle.