Figure 1.
LCEA and AI measurement methods. (A) LCEA was measured as the angle between a first line (thick white) through the femoral head center and perpendicular to the inferior aspect of ischial tuberosities (light blue) and a second line connecting the femoral head center to the lateral aspect of acetabular sourcil (red). (B) AI was measured as the angle between a first line parallel to the inferior aspect of ischial tuberosities and a second line connecting the medial and lateral aspects of acetabular sourcils (thin white).