Table 2 Intraclass correlation coefficient and smallest detectable change (in mm) of the three acetabular offsets for all combinations of technical and anatomical coordinate systems.

From: Definition and reliability of 3D acetabular and global offset measurements from bi-plane X-rays

  1. The ACET convention uses acetabula to define the medio-lateral axis. The PLANE convention use the normal to the plane defined by the centre of the sacral slope (SSC), the pubic symphisys (PSYM) and the midpoint of the acetabula to define the medio-lateral axis.
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