Validation of a Novel Method of Measuring Cup Orientation Using BiPlanar Simultaneous Radiographic Images

The accuracy of cup anteversion measurement on postoperative pelvic radiographs: A comparative retrospective cohort study between DDH and non-DDH patients

“…Postoperative anteroposterior pelvic radiographs remain a crucial tool in the follow-up after THA [ 4 , 5 ]; in this study, a majority of the patients lacked postoperative CT images, which may be related to the higher radiation exposure and the significant artifacts in the images after prosthesis implantation. With the increasing workload in radiology department [ 14 ], ensuring standard positioning for X-ray procedures in all patients proves challenging, notably during the initial post-surgery days due to pain at the operation site.…”

“…CT scans, particularly three-dimensional CT (3D-CT), is considered the gold standard as it effectively controls confounding factors, mainly pelvic position and X-ray projection direction [ [1] , [2] , [3] ]. However, anteroposterior pelvic radiographs continue to be favored due to their notable advantages of lower radiation exposure and greater convenience [ 4 , 5 ]. Previous studies have highlighted reliability issues in using X-rays for the assessment of acetabular cup orientation, and it is generally believed that measurements of cup inclination are reliable, while assessments of cup anteversion are less dependable due to those confounding factors [ 6 ].…”