{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,24]],"date-time":"2026-06-24T00:20:21Z","timestamp":1782260421275,"version":"3.54.5"},"reference-count":46,"publisher":"SAGE Publications","issue":"10","license":[{"start":{"date-parts":[[2022,7,22]],"date-time":"2022-07-22T00:00:00Z","timestamp":1658448000000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["Am J Sports Med"],"published-print":{"date-parts":[[2022,8]]},"abstract":"<jats:sec>\n                    <jats:title>Background:<\/jats:title>\n                    <jats:p>\n                      Validated software tools (Clinical Graphics [CG] and Hip\n                      <jats:sup>2<\/jats:sup>\n                      Norm) permit measurement of the percentage of femoral head coverage (%FHC), which aids in morphological classification and prediction of outcome after hip preservation surgery.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Purpose:<\/jats:title>\n                    <jats:p>(1) To assess whether acetabular parameter measurements determined from 2 commonly used software systems are comparable. (2) To determine which parameters influence the correlation or differences between software outputs and measurements.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Study Design:<\/jats:title>\n                    <jats:p>Cohort study (diagnosis); Level of evidence, 2.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods:<\/jats:title>\n                    <jats:p>\n                      The study included 69 patients (90 hips) who underwent periacetabular osteotomy and had comprehensive preoperative imaging available. Lateral center-edge angle (LCEA), acetabular index (AI), and %FHC were determined using 3-dimensional computed tomography (CT) measurements by CG and Hip\n                      <jats:sup>2<\/jats:sup>\n                      Norm software. Images of 18 pelvises were segmented to determine spinopelvic parameters and subtended acetabular angles. Between-group measurements were compared using correlation coefficients and Bland-Altman analyses. The difference in the outputs of the 2 programs was defined as delta (\u0394). Radiographic parameters were tested to assess whether they were responsible for differences in %FHC between software programs.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results:<\/jats:title>\n                    <jats:p>\n                      Strong correlations between LCEA (\u03c1 = 0.862) and AI (\u03c1 = 0.825) measurements were seen between the Hip\n                      <jats:sup>2<\/jats:sup>\n                      Norm and CG programs. However, weak correlation was seen in the estimate of %FHC (\u03c1 = 0.358), with the presence of a systematic error. Hip\n                      <jats:sup>2<\/jats:sup>\n                      Norm consistently produced lower anterior, posterior, and total %FHC values than CG. The %FHC determined by CG, but not Hip\n                      <jats:sup>2<\/jats:sup>\n                      Norm, correlated with acetabular subtended angles ( P &lt; .05). Pelvic tilt measured on CT did not correlate with pelvic tilt estimated by Hip\n                      <jats:sup>2<\/jats:sup>\n                      Norm ( P = .56), and \u0394PelvicTilt strongly correlated with the difference in %FHC by the 2 software programs (\u03c1 = 0.63; P = .005), pelvic incidence (\u03c1 = 0.73; P &lt; .001), and pelvic tilt (\u03c1 = \u22120.91; P &lt; .001) as per CT.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion:<\/jats:title>\n                    <jats:p>\n                      The correlation of %FHC between Hip\n                      <jats:sup>2<\/jats:sup>\n                      Norm and CG was weak (\u03c1 = 0.358). The difference in measurements of %FHC correlated with \u0394PelvicTilt. The %FHC determined by CG strongly correlated with the segmented acetabular subtended angles and thus more likely reflected true values. Hip preservation surgeons should be aware of these measurement differences because %FHC is important in the diagnosis and prognosis of acetabular dysplasia.\n                    <\/jats:p>\n                  <\/jats:sec>","DOI":"10.1177\/03635465221109240","type":"journal-article","created":{"date-parts":[[2022,7,22]],"date-time":"2022-07-22T13:46:51Z","timestamp":1658497611000},"page":"2637-2646","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":6,"title":["Comparison of Acetabular Measurements Between 2 Validated Software Programs Used in Hip Preservation Surgery"],"prefix":"10.1177","volume":"50","author":[{"given":"Pierre","family":"Laboudie","sequence":"first","affiliation":[{"name":"Orthopaedic Surgery Department, Cochin Hospital, Paris, France"},{"name":"Division of Orthopaedic Surgery, The Ottawa Hospital, Ottawa, Ontario, Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Daniel","family":"Fischman","sequence":"additional","affiliation":[{"name":"Division of Orthopaedic Surgery, Hospital Militar Santiago, Chile"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Andrew D.","family":"Speirs","sequence":"additional","affiliation":[{"name":"Department of Mechanical and Aerospace Engineering, Carleton University, Ottawa, Ontario, Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Saif","family":"Salih","sequence":"additional","affiliation":[{"name":"Department of Trauma and Orthopaedics, Northern General Hospital, Sheffield, UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Fernando","family":"Holc","sequence":"additional","affiliation":[{"name":"Sir John Charnley Hip Surgery Unit, Institute of Orthopaedics Carlos E. 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