{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,29]],"date-time":"2026-09-29T00:00:38Z","timestamp":1790640038075,"version":"4.1.0"},"reference-count":34,"publisher":"Oxford University Press (OUP)","issue":"7","license":[{"start":{"date-parts":[[2024,1,27]],"date-time":"2024-01-27T00:00:00Z","timestamp":1706313600000},"content-version":"vor","delay-in-days":1152,"URL":"https:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"},{"start":{"date-parts":[[2021,3,30]],"date-time":"2021-03-30T00:00:00Z","timestamp":1617062400000},"content-version":"vor","delay-in-days":119,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"}],"content-domain":{"domain":["asbmr.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2020,12,1]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:p>During aging, changes in endosteal and periosteal boundaries of cortical bone occur that differ between men and women. We here develop a new procedure that uses high-resolution peripheral quantitative CT (HR-pQCT) imaging and 3D registration to identify such changes within the timescale of longitudinal studies. A first goal was to test the sensitivity of the approach. A second goal was to assess differences in periosteal\/endosteal expansion over time between men and women. Rigid 3D registration was used to transform baseline and all follow-up (FU) images to a common reference configuration for which the region consisting of complete slices (largest common height) was determined. Periosteal and endosteal contours were transformed to the reference position to determine the net periosteal and endosteal expansion distances. To test the sensitivity, images from a short-term reproducibility study were used (15 female, aged 21 to 47\u2009years, scanned three times). To test differences between men and women, images from a subset of the Geneva Retirees Cohort were used (248 female, 61 male, average age 65\u2009years, 3.5 and 7\u2009years FU). The sensitivity study indicated a least significant change for detecting periosteal\/endosteal expansion of 41\/31 microns for the radius and 17\/26 microns for the tibia. Results of the cohort study showed significant net endosteal retraction only in females at the radius and tibia after 3.5\u2009years (38.0 and 38.4 microns, respectively) that further increased at 7\u2009years FU (70.4 and 70.8 microns, respectively). No significant net periosteal changes were found for males or females at 7\u2009years. The results demonstrate that it is possible to measure changes in endosteal contours in longitudinal studies within several years. For the investigated cohort, significant endosteal retraction was found in females but not in males. Whether these changes in cortical geometry are related to fracture risk remains to be investigated in larger cohorts \u00a9 2021 The Authors. Journal of Bone and Mineral Research published by Wiley Periodicals LLC on behalf of American Society for Bone and Mineral Research (ASBMR).<\/jats:p>","DOI":"10.1002\/jbmr.4285","type":"journal-article","created":{"date-parts":[[2021,3,16]],"date-time":"2021-03-16T15:54:24Z","timestamp":1615910064000},"page":"1351-1363","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":12,"title":["A Novel HR-pQCT Image Registration Approach Reveals Sex-Specific Changes in Cortical Bone Retraction With Aging"],"prefix":"10.1093","volume":"36","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-2278-2934","authenticated-orcid":false,"given":"Bert","family":"van Rietbergen","sequence":"first","affiliation":[{"name":"Orthopaedic Biomechanics, Department of Biomedical Engineering Eindhoven University of Technology Eindhoven The Netherlands"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6174-1951","authenticated-orcid":false,"given":"Emmanuel","family":"Biver","sequence":"additional","affiliation":[{"name":"Division of Bone Diseases Geneva University Hospitals and Faculty of Medicine Geneva Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3338-1148","authenticated-orcid":false,"given":"Thierry","family":"Chevalley","sequence":"additional","affiliation":[{"name":"Division of Bone Diseases Geneva University Hospitals and Faculty of Medicine Geneva Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Keita","family":"Ito","sequence":"additional","affiliation":[{"name":"Orthopaedic Biomechanics, Department of Biomedical Engineering Eindhoven University of Technology Eindhoven The Netherlands"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Roland","family":"Chapurlat","sequence":"additional","affiliation":[{"name":"INSERM UMR 1033 Universit\u00e9 de Lyon Lyon France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1372-4417","authenticated-orcid":false,"given":"Serge","family":"Ferrari","sequence":"additional","affiliation":[{"name":"Division of Bone Diseases Geneva University Hospitals and Faculty of Medicine Geneva Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"286","published-online":{"date-parts":[[2021,3,16]]},"reference":[{"issue":"6","key":"2024012713473940000_jbmr4285-bib-0001","doi-asserted-by":"crossref","first-page":"886","DOI":"10.1002\/jor.1100060613","article-title":"Sex differences in age-related remodeling of the femur and tibia","volume":"6","author":"Ruff","year":"1988","journal-title":"J Orthop 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