{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,8]],"date-time":"2026-10-08T13:10:49Z","timestamp":1791465049341,"version":"4.3.4"},"reference-count":28,"publisher":"Wiley","issue":"7","license":[{"start":{"date-parts":[[2020,4,30]],"date-time":"2020-04-30T00:00:00Z","timestamp":1588204800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"DOI":"10.13039\/100000069","name":"National Institute of Arthritis and Musculoskeletal and Skin Diseases","doi-asserted-by":"publisher","award":["R21\u2010AR063844"],"award-info":[{"award-number":["R21\u2010AR063844"]}],"id":[{"id":"10.13039\/100000069","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100008884","name":"Nakatani Foundation for Advancement of Measuring Technologies in Biomedical Engineering","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100008884","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100008731","name":"Nakatomi Foundation","doi-asserted-by":"publisher","id":[{"id":"10.13039\/100008731","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Journal Orthopaedic Research"],"published-print":{"date-parts":[[2020,7]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Pelvic sagittal inclination (PSI) is often evaluated in patients with hip pathology using lateral radiographs. However, it would be useful if PSI could be predicted from an anteroposterior radiograph since this film is ubiquitous in the evaluation of hip pathology. Herein, computer\u2010modeling was applied to predict PSI from radiographic measurements assessed in the anteroposterior plane. Three\u2010dimensional surface models of the pelvis, femur, and sacrum were reconstructed from computed tomography images of 50 women with hip dysplasia. This study cohort was selected as changes in PSI alter femoral head coverage, which is relevant to the diagnosis and treatment of hip dysplasia, a known cause of hip osteoarthritis. Five radiographic parameters commonly used to independently estimate PSI were evaluated after bone surfaces were projected to an anteroposterior plane, including the symphysis to sacrococcygeal joint distance (S\u2010S distance), the pelvic foramen aspect ratio (PF ratio), the distance between the symphysis and a line connecting the femoral head centers (S\u2010H distance), the sacro\u2010femoral\u2010pubic angle (SFP angle), and the pelvic vertical ratio (PVR). Regression models determined the ability of these parameters to predict PSI from \u221220\u00b0 to 20\u00b0 at 1\u00b0 increment. All five parameters showed a strong correlation with the PSI (all <jats:italic>r<\/jats:italic>\u2009&gt;\u20090.9). From the regression models, PSI was estimated with a median (maximum) absolute error of 3.6\u00b0 (18.4\u00b0), 3.8\u00b0 (17.7\u00b0), 5.2\u00b0 (17.9\u00b0), 5.8\u00b0 (28.8\u00b0), and 3.2\u00b0 (23.5\u00b0) for the S\u2010S distance, PF ratio, S\u2010H distance, SFP angle, and PVR, respectively. The regression model for S\u2010S distance had a mean slope of 2.18 that ranged from 1.98 to 2.41 when the sacrococcygeal joint was located superior to the symphysis. Results indicated that substantial errors occur when estimating the actual value of PSI from an anteroposterior radiograph. However, the change in PSI could be estimated from the S\u2010S distance, which may aid surgeons to successfully increase head coverage through periacetabular osteotomy and to locate the acetabular cup in a functional position for total hip arthroplasty.<\/jats:p>","DOI":"10.1002\/jor.24701","type":"journal-article","created":{"date-parts":[[2020,4,22]],"date-time":"2020-04-22T12:32:01Z","timestamp":1587558721000},"page":"1477-1485","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":19,"title":["Can measurements from an anteroposterior radiograph predict pelvic sagittal inclination?"],"prefix":"10.1002","volume":"38","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-9245-1743","authenticated-orcid":false,"given":"Keisuke","family":"Uemura","sequence":"first","affiliation":[{"name":"Department of Orthopaedics University of Utah  Salt Lake City Utah"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Penny R.","family":"Atkins","sequence":"additional","affiliation":[{"name":"Department of Orthopaedics University of Utah  Salt Lake City Utah"},{"name":"Department of Bioengineering University of Utah  Salt Lake City Utah"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Masashi","family":"Okamoto","sequence":"additional","affiliation":[{"name":"Department of Radiology Kameda Daiichi Hospital  Niigata City Niigata Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kunihiko","family":"Tokunaga","sequence":"additional","affiliation":[{"name":"Niigata Hip Joint Center Kameda Daiichi Hospital  Niigata City Niigata Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4708-2608","authenticated-orcid":false,"given":"Andrew E.","family":"Anderson","sequence":"additional","affiliation":[{"name":"Department of Orthopaedics University of Utah  Salt Lake City Utah"},{"name":"Department of Bioengineering University of Utah  Salt Lake City Utah"},{"name":"Scientific Computing and Imaging Institute University of Utah  Salt Lake City Utah"},{"name":"Department of Physical Therapy University of Utah  Salt Lake City 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