This calculator converts a measured acetabular version angle to an alternative version angle. These definitions are primarily relevant to hip arthroplasties, where the acetabular opening is conceptualized as planar. Discussion of acetabular rim morphology in the context of femoro-acetabular impingement implies a different conceptualization of acetabular ‘version.’
- *Note: Cephalic beam angulation is only relevant to the axiolateral version angle.
- Radiographic inclination is also called lateral opening, and is measured on the PA radiograph.
- Anatomic version is measured on axial CT.
- For a explication of version conventions: Clin Orthop Relat Res. 1995 Jul;(316):106-11