Fig. 4 A-C.

(A) An AP pelvis x-ray shows a 48-year-old woman with mild hip dysplasia (LCE angle = 19°). (B) The Manual 3-D analysis is shown. (C) The automated 3-D analysis is shown with dGEMRIC indices color-coded. The red indicates regions of low dGEMRIC indices demonstrating low glycosaminoglycan content corresponding to biochemical cartilage damage and vice-versa for blue. (B) Using the manual 3D analysis, the mean dGEMRIC index was 513 ms and cartilage surface area was 1394 mm². This was comparable to (C) the automated 3-D analysis which yielded a mean dGEMRIC index of 514 ms and a cartilage surface area of 1257 mm². (B) Overestimation of the manual 3-D analysis (Table 3) for measuring thickness in the anterioinferior quadrant resulted in a difference of 1.6 mm compared to the automated 3-D analysis.