Figure 1
From: Definition and reliability of 3D acetabular and global offset measurements from bi-plane X-rays

Workflow of the method. Tech stands for technical, Anat for anatomical, CS for coordinate system, AP for antero-posterior, ML for medio-lateral, V for vertical, and Meas. for measurement. \({{\varvec{R}}}_{T\to A}\) represents the orientation of the technical coordinate system with respect to the anatomical coordinate system.