{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,30]],"date-time":"2026-07-30T11:21:43Z","timestamp":1785410503038,"version":"3.56.0"},"reference-count":35,"publisher":"Oxford University Press (OUP)","issue":"1132","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2022,4,1]]},"abstract":"<jats:sec>\n                  <jats:title>Objectives:<\/jats:title>\n                  <jats:p>To validate reliability of slice-encoding for metal artefact correction (SEMAC)-MRI findings in prosthesis loosening detection by comparing them to surgical outcomes (gold standard) in symptomatic patients following hip arthroplasties. To evaluate periprosthetic anatomical structures in symptomatic patients to identify an alternative cause of hip symptoms.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Methods:<\/jats:title>\n                  <jats:p>We prospectively followed 47 symptomatic patients (55 hips, 39 painful hips \u2013 group P and 16 control hips \u2013 group C) at our institution from 2011 to 2016. We acquired 1.5\u2009T MRI conventional and SEMAC-MRI images for all patients. Two consultants scored MRI for osteolysis and marrow oedema zone-wise using predefined signal characteristics and settled scoring variations by consensus. We used Spearman Rank-Order Correlation for correlation analysis and used OMERACT (Outcome Measures in Rheumatology) filter pillars to validate SEMAC-MRI findings.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Results:<\/jats:title>\n                  <jats:p>Eleven patients needed revision surgery, all from group P. None from group C required revision surgery. Remaining 28 hips in the group P were managed conservatively pain completely resolved in 21 hips, eight hips had trochanteric bursitis, eight had extraarticular cause and the remaining five hips had spontaneous pain resolution. We found moderate-to-weak correlation between SEMAC-MRI findings for prosthesis loosening and revision surgery outcomes. Sensitivity, Specificity, PPV and NPV in Group P were (72.7, 64.3, 44.4, 85.7%) in T1W-SEMAC, (90.9, 46.4, 40.0, 92.9%) in STIR-SEMAC and (36.3, 78.5, 40.0, 75.8%) in PDW-SEMAC.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Conclusion:<\/jats:title>\n                  <jats:p>Negative SEMAC-MRI results can effectively exclude prosthesis loosening confirmed on revision surgery and SEMAC-MRI can detect alternative cause of hip pain accurately.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Advances in knowledge:<\/jats:title>\n                  <jats:p>Negative SEMAC-MRI in painful THA patients can effectively exclude prosthesis loosening as a cause.<\/jats:p>\n               <\/jats:sec>","DOI":"10.1259\/bjr.20210940","type":"journal-article","created":{"date-parts":[[2022,2,11]],"date-time":"2022-02-11T18:12:39Z","timestamp":1644603159000},"source":"Crossref","is-referenced-by-count":6,"title":["Reliability of slice-encoding for metal artefact correction (SEMAC) MRI to identify prosthesis loosening in patients with painful total hip arthroplasty \u2013 a single centre, prospective, surgical validation study"],"prefix":"10.1093","volume":"95","author":[{"given":"Tsuneari","family":"Takahashi","sequence":"first","affiliation":[{"name":"Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds , Leeds , UK"},{"name":"Department of Orthopaedic Surgery, Jichi Medical University , Tochigi , Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Siddharth","family":"Thaker","sequence":"additional","affiliation":[{"name":"Chapel Allerton Hospital, Leeds Teaching Hospital NHS Trust , Leeds , UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Giovanni","family":"Lettieri","sequence":"additional","affiliation":[{"name":"Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds , Leeds , UK"},{"name":"Chapel Allerton Hospital, Leeds Teaching Hospital NHS Trust , Leeds , UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Anthony","family":"Redmond","sequence":"additional","affiliation":[{"name":"Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds , Leeds , UK"},{"name":"Chapel Allerton Hospital, Leeds Teaching Hospital NHS Trust , Leeds , UK"},{"name":"The NIHR Leeds Biomedical Research Centre , Leeds , UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Michael R.","family":"Backhouse","sequence":"additional","affiliation":[{"name":"Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds , Leeds , UK"},{"name":"Warwick Clinical Trials Unit, Warwick Medical School, University of Warwick , Coventry , UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Martin","family":"Stone","sequence":"additional","affiliation":[{"name":"Chapel Allerton Hospital, Leeds Teaching Hospital NHS Trust , Leeds , UK"},{"name":"The NIHR Leeds Biomedical Research Centre , Leeds , UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hemant","family":"Pandit","sequence":"additional","affiliation":[{"name":"Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds , Leeds , UK"},{"name":"Chapel Allerton Hospital, Leeds Teaching Hospital NHS Trust , Leeds , UK"},{"name":"The NIHR Leeds Biomedical Research Centre , Leeds , UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Philip","family":"O'Connor","sequence":"additional","affiliation":[{"name":"Chapel Allerton Hospital, Leeds Teaching Hospital NHS Trust , Leeds , UK"},{"name":"The NIHR Leeds Biomedical Research Centre , Leeds , UK"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"286","published-online":{"date-parts":[[2022,2,11]]},"reference":[{"key":"2024050216154516300_b1","volume-title":"Executive summary. 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