{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,5]],"date-time":"2026-08-05T03:43:09Z","timestamp":1785901389698,"version":"3.56.0"},"reference-count":21,"publisher":"SAGE Publications","issue":"1","license":[{"start":{"date-parts":[[2019,2,4]],"date-time":"2019-02-04T00:00:00Z","timestamp":1549238400000},"content-version":"vor","delay-in-days":34,"URL":"http:\/\/www.sagepub.com\/licence-information-for-chorus"}],"funder":[{"DOI":"10.13039\/501100009023","name":"Precursory Research for Embryonic Science and Technology","doi-asserted-by":"publisher","award":["20407"],"award-info":[{"award-number":["20407"]}],"id":[{"id":"10.13039\/501100009023","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["J Orthop Surg (Hong Kong)"],"published-print":{"date-parts":[[2019,1,1]]},"abstract":"<jats:sec>\n                    <jats:title>Purpose:<\/jats:title>\n                    <jats:p>Pelvic position on the sagittal plane is usually evaluated with the pelvic sagittal inclination (PSI) angle from a single radiograph. However, the reproducibility of pelvic positioning has not been investigated, and thus, the validity of measuring the PSI from a single film\/time point is not understood. Herein, the reproducibility of a patient\u2019s pelvic positions in supine and standing postures was analyzed.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods:<\/jats:title>\n                    <jats:p>A total of 34 patients who underwent either a pelvic osteotomy or total hip arthroplasty were enrolled in this study. Preoperative radiographs in both supine and standing postures were acquired twice (first X-ray and second X-ray) within 6 months; preoperative computed tomography (CT) images of the full pelvis were also acquired in a supine posture (preop-CT). To eliminate measurement variability, each PSI was automatically measured from radiographs and CT images through the use of CT segmentation and landmark localization followed by intensity-based 2D-3D registration. The absolute difference of PSI among each image was calculated and the intra-class correlation coefficient (ICC) in each posture was also analyzed.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results:<\/jats:title>\n                    <jats:p>The median absolute differences of PSI in the supine posture were 1.3\u00b0 between the first and second X-rays, 1.2\u00b0 between the first X-ray and preop-CT, and 1.3\u00b0 between the second X-ray and preop-CT. The median absolute difference of PSI in the standing posture was 1.5\u00b0. The ICC was 0.965 (95% CI: 0.939\u20130.981) in supine and 0.977 (95% CI: 0.954\u20130.988) during standing.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions:<\/jats:title>\n                    <jats:p>Pelvic positions in supine and standing postures are reproducible. Thus, measuring the PSI from a single radiograph is reliable.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1177\/2309499019828515","type":"journal-article","created":{"date-parts":[[2019,2,4]],"date-time":"2019-02-04T22:46:04Z","timestamp":1549320364000},"update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":5,"title":["Reproducibility of pelvic sagittal inclination while acquiring radiographs in supine and standing postures"],"prefix":"10.1177","volume":"27","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-9245-1743","authenticated-orcid":false,"given":"Keisuke","family":"Uemura","sequence":"first","affiliation":[{"name":"Department of Orthopaedic Medical Engineering, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Masaki","family":"Takao","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Medical 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Medicine, Osaka University, Suita, Osaka, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Takashi","family":"Sakai","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yoshinobu","family":"Sato","sequence":"additional","affiliation":[{"name":"Graduate School of Information Science, Nara Institute of Science and Technology, Ikoma, Nara, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nobuhiko","family":"Sugano","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Medical Engineering, Graduate School of Medicine, Osaka University, Suita, Osaka, 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