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Pelvic anteroposterior X-ray images from 354 subjects (120 DDH and 234 normal) were collected locally at two hospitals in northern Jordan. The present study employs deep transfer learning in detecting DDH in pelvic X-ray images without the need for explicit measurements. Recent advances in deep learning artificial intelligence have enabled the use of many image-based medical decision-making applications. A pelvic X-ray inspection represents the gold standard for DDH diagnosis. An early diagnosis in the first few months from birth can drastically improve healing, render surgical intervention unnecessary and reduce bracing time. It can lead to developmental abnormalities in terms of mechanical difficulties and a displacement of the joint (i.e., subluxation or dysplasia). doi:10.Developmental dysplasia of the hip (DDH) is a relatively common disorder in newborns, with a reported prevalence of 1– births. Studies on Dysplastic Acetabula and Congenital Subluxation of the Hip Joint with Special Reference to the Complication of Osteo-Arthritis. Welton K, Jesse M, Kraeutler M, Garabekyan T, Mei-Dan O. Discrepancies in Measuring Acetabular Coverage: Revisiting the Anterior and Lateral Center Edge Angles. Hanson J, Kapron A, Swenson K, Maak T, Peters C, Aoki S.
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Acetabular Cover in Congenital Dislocation of the Hip. Ogata S, Moriya H, Tsuchiya K, Akita T, Kamegaya M, Someya M. Imaging Evaluation of Developmental Hip Dysplasia in the Young Adult. What Are the Radiographic Reference Values for Acetabular Under- and Overcoverage? Clin Orthop Relat Res. Tannast M, Hanke M, Zheng G, Steppacher S, Siebenrock K.
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Imaging of the Hip: A Systematic Approach to the Young Adult Hip. Lateral Center-Edge Angle on Conventional Radiography and Computed Tomography. Monazzam S, Bomar J, Cidambi K, Kruk P, Hosalkar H. Femoroacetabular Impingement: Radiographic Diagnosis-What the Radiologist Should Know. Gunnar Wiberg (1902-1988), a Swedish orthopedic surgeon, first described the lateral center-edge angle in 1939 9,10.ġ. The lateral acetabular rim method overestimates coverage by ~4° compared to the acetabular sourcil method as it includes non-weightbearing bone that forms part of the labral base 8.Ĭannot be measured in patients with abnormal femoral heads due to previous injury or osteonecrosis 5
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InterpretationĪs expected, lateral acetabular rim and acetabular sourcil measurements show significant differences, which need to be taken into account 7. In a modification by Ogata et al., the second line runs to the lateral edge of the acetabular sourcil 6, which is proposed to be a more functional method given that this measurement includes the weight-bearing portion of the acetabulum 8. The angle is then measured between two lines drawn from the center of the circle, one running vertically along the longitudinal axis of the pelvis and the other to the lateral acetabular rim 9. The lateral center-edge angle was first described by Wiberg and is calculated on AP pelvic radiographs by drawing a best fit circle for the inferior and medial margins femoral head. The lateral center-edge angle has primarily been described in assessing for acetabular dysplasia, but can also be used in femoroacetabular impingement (FAI).