ArticlePloS one2026
Normal values of femoral head coverage angles on three-dimensional computed tomography images.
Article in PloS one, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
introductionIdentifying novel diagnostic parameters is essential to address the inaccuracies related to femoral head coverage angle measurements using conventional methods. This study aimed to propose new femoral head coverage landmarks on 3D pelvic CT images in a Korean population and to present reference values based on these landmarks.
methodsThis single-center retrospective cohort study defined the center, lateral, anterior, and posterior margins of the acetabulum from three-dimensional (3D) pelvic computed tomography (CT) scans of healthy Korean individuals. The lateral center-edge angle (LCEA), anterior center-edge angle (ACEA), posterior center-edge angle (PCEA), anterior acetabular sector angle (AASA), and posterior acetabular sector angle (PASA) were measured in 3D space.
resultsThe normal values for 3D LCEA in Korean males and females were 34.8° (SD = 8.3°) and 32.0° (SD = 6.9°), respectively. The 3D angles measured showed significant variations according to sex and age, with center-edge angles (LCEA, ACEA, and PCEA) generally increasing with age, whereas sector angles (AASA and PASA) showed a decreasing trend.
conclusionThe standardized values and statistical findings based on sex and age provided in this study offer valuable references for guiding surgical interventions in the acetabulum. Also, the proposed method yielded more likely to be reliable results than traditional two-dimensional methods with substantial differences.
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