3D measurement of FHC.

Abstract

<p>(A) The superior surface of the native femoral head (approximated with blue triangle meshes) and the opposing acetabular surface are major weight-bearing areas. (B) Cranial rim points of the acetabulum and the superior hemisphere are projected onto the axial plane to produce a circle and a curved line (the projected acetabular rim contour) cutting across it. (C) A topographical image on the axial plane represents the femoral head with its covered (green area) and uncovered (white area) parts. (D) The percentage of FHC is calculated as a ratio between the green area and the sum of the green and the white areas on the femoral head.</p