{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,8]],"date-time":"2026-07-08T03:18:08Z","timestamp":1783480688167,"version":"3.55.0"},"reference-count":30,"publisher":"Springer Science and Business Media LLC","issue":"1","license":[{"start":{"date-parts":[[2026,7,8]],"date-time":"2026-07-08T00:00:00Z","timestamp":1783468800000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"},{"start":{"date-parts":[[2026,7,8]],"date-time":"2026-07-08T00:00:00Z","timestamp":1783468800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"}],"content-domain":{"domain":["link.springer.com"],"crossmark-restriction":false},"short-container-title":["Arthroplasty"],"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Background<\/jats:title>\n                    <jats:p>Muscle atrophy is prevalent among patients with hip osteoarthritis, yet quantitative assessment of the peri-hip muscles remains challenging. Although computed tomography (CT) enables objective evaluation, manual segmentation is time-consuming and impractical for routine use. TotalSegmentator, an artificial intelligence-based extension of 3D Slicer, allows rapid automated muscle segmentation. The purpose of this study was to evaluate the accuracy, reproducibility, and clinical relevance of automated peri-hip muscle segmentation using TotalSegmentator in patients with hip osteoarthritis.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>This retrospective cohort study included 53 female patients (106 hips) with bilateral hip osteoarthritis. Automated segmentation using TotalSegmentator was performed for the gluteus maximus, gluteus medius, and paraspinal muscles and compared with manual segmentation. Muscle volume and CT attenuation were analyzed. Agreement and intraobserver reproducibility were assessed using intraclass correlation coefficients (ICCs). Associations with patient demographics, spinopelvic alignment, and hip function, assessed using the modified Harris Hip Score (mHHS), were also examined in exploratory secondary analyses.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      TotalSegmentator demonstrated moderate to good reliability for muscle volume and CT attenuation compared with manual segmentation (ICCs 0.47\u20130.83), with strong correlations between methods (\n                      <jats:italic>r<\/jats:italic>\n                      \u2009=\u20090.79\u20130.96). Muscle volumes measured by TotalSegmentator were significantly smaller, whereas CT attenuation values were significantly higher than those obtained by manual segmentation. Intraobserver reproducibility was excellent, with ICCs of 1.00 for all muscles. Higher CT attenuation demonstrated a weak positive correlation with young age, better sagittal malalignment, and higher postoperative mHHS.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>Automated peri-hip muscle segmentation using TotalSegmentator provides rapid, accurate, and reproducible quantitative assessment of muscle volume and quality in patients with hip osteoarthritis.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1186\/s42836-026-00412-8","type":"journal-article","created":{"date-parts":[[2026,7,8]],"date-time":"2026-07-08T03:02:54Z","timestamp":1783479774000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Accuracy of automated segmentation of gluteus and paraspinal muscles in patients with hip osteoarthritis using TotalSegmentator in 3Dslicer"],"prefix":"10.1186","volume":"8","author":[{"given":"Hyonmin","family":"Choe","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shogo","family":"Yokota","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ryohei","family":"Iino","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Koki","family":"Abe","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hironori","family":"Yamane","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yuta","family":"Hieda","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hiroyuki","family":"Ike","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ken","family":"Kumagai","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Naomi","family":"Kobayashi","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yutaka","family":"Inaba","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2026,7,8]]},"reference":[{"issue":"9597","key":"412_CR1","doi-asserted-by":"publisher","first-page":"1508","DOI":"10.1016\/S0140-6736(07)60457-7","volume":"370","author":"ID Learmonth","year":"2007","unstructured":"Learmonth ID, Young C, Rorabeck C. 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The requirement for written informed consent was waived by the institutional review board owing to the retrospective nature of the study, and an opt-out approach was adopted.","order":2,"name":"Ethics","group":{"name":"EthicsHeading","label":"Ethics approval and consent to participate"}},{"value":"Not applicable.","order":3,"name":"Ethics","group":{"name":"EthicsHeading","label":"Consent for publication"}},{"value":"HC has received speaker honoraria for paid presentations and research support as a principal investigator from Stryker and Johnson & Johnson. HC also serves on the editorial boards of Journal of Orthopaedic Research, Journal of Clinical Medicine, and also serves on the editorial boards of Arthroplasty, and declares that all authors were not involved in the journal\u2019s review or decisions related to this manuscript. YI has received speaker honoraria for paid presentations from Stryker and has received research support as a principal investigator from Stryker, Smith & Nephew, and Zimmer Biomet. YI also serves on the editorial boards of Journal of Arthroplasty and Journal of Orthopaedic Science. All other authors declare that they have no competing interests.","order":4,"name":"Ethics","group":{"name":"EthicsHeading","label":"Competing interests"}}],"article-number":"51"}}