Fig. 2From: Safe surgical corridor for iliosacral screw placement in unstable pelvic fractures: a computed-tomography-guided validation study of the “triangulation method”Measurement of anatomical data (a) The ASIS and the greater trochanter position, (b) safe access for iliosacral screws, (c) concentric circles of the femoral head and neck, (d) the femoral neck axis, and (e) the femoral rotation angle ASIS, anterior superior iliac spineBack to article page