Fig. 7 A-C.

(A) An AP pelvis image shows a 27-year-old woman with severe acetabular retroversion (positive cross-over sign, posterior wall sign, and ischial spine sign). (B) Fully-automated 3-D cartilage model is shown. The dGEMRIC indices are color-coded. Biochemical cartilage damage as shown with lower (green) dGEMRIC indices is present anteriorly compared to the high dGEMRIC indices posteriorly (blue). The overall (1250 mm²) and the anterosuperior cartilage surface area were smaller (457 mm²) compared with the respective means of the entire study group (overall: 1617 ± 426 mm²; anterosuperior: 610 ± 204 mm²; Table 7). The patient underwent anteverting periacetabular osteotomy for correction of malrotation of the hemipelvis. (C) AP pelvis view at the last clinical followup 4 years after surgery shows no progression of osteoarthritis and the patient was asymptomatic.