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Fig. 2 | BMC Musculoskeletal Disorders

Fig. 2

From: Use of iliac crest allograft for Dega pelvic osteotomy in patients with cerebral palsy

Fig. 2

Hip internal rotation view. For the right hip neck-shaft angle (NSA) was defined as the angle between a line passing through the center of the femoral shaft and another line connecting the center of the femoral head and the midpoint of the femoral neck. The center of the femoral head was the center of the largest best-fitting circle inside the femoral head. Acetabular index (AI) was defined as the angle between the acetabular roof and the Hilgenreiner’s line. For the left hip, migration percentage (MP) was calculated by dividing the width of the femoral head lateral to Perkin’s line (a) by the total width of the femoral head (b)

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