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However, there is no consensus on how to perform the procedure. As part of the ASTEROID phase-2b multicenter trial, we used 29 same-day repeated scans from adults with OI to identify a method that minimized measurement error. We evaluated input image type, registration method, segmentation mask, and for grayscale images various values for the voxel density difference considered formed or resorbed, minimum formation\/resorption cluster size, and Gaussian smoothing sigma. We verified the accuracy of our method and then used it on longitudinal scans (baseline, 6, 12, 18, and 24\u00a0mo) from 78 participants to assess bone formation and resorption induced by an anabolic (setrusumab) and anti-catabolic (zoledronic acid) treatments as part of the ASTEROID trial. Regardless of image registration method, binary input images resulted in large errors ~13% and ~8% for first- and second-generation scanners, respectively. For the grayscale input images, errors were smaller for 3D compared to matched angle registration. For both scanner generations, a density threshold of 200\u00a0mgHA\/cm3 combined with Gaussian noise reduction resulted in errors &amp;lt;1%. We verified the method was accurate by showing that similar regions of bone formation and resorption were identified when comparing each scan from the same-day repeated scans with a scan from another timepoint. Timelapse analysis revealed a dose-dependent increase in bone formation and resorption with setrusumab treatment. Zoledronic acid altered bone changes in favor of formation, although no changes reached statistical significance. This study identifies a timelapse method that minimizes measurement error, which can be used in future studies to improve the uniformity of results. This non-invasive imaging biomarker revealed dose dependent bone (re)modeling outcomes from 1\u00a0year of setrusumab treatment in adults with OI.<\/jats:p>","DOI":"10.1093\/jbmr\/zjaf013","type":"journal-article","created":{"date-parts":[[2025,1,22]],"date-time":"2025-01-22T15:16:19Z","timestamp":1737558979000},"page":"348-361","source":"Crossref","is-referenced-by-count":7,"title":["Non-invasive quantification of bone (re)modeling dynamics in adults with osteogenesis imperfecta treated with setrusumab using timelapse high-resolution peripheral-quantitative computed tomography"],"prefix":"10.1093","volume":"40","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-5638-976X","authenticated-orcid":false,"given":"Seyedmahdi","family":"Hosseinitabatabaei","sequence":"first","affiliation":[{"name":"Research Centre, Shriners Hospitals for Children-Canada , Montreal, QC H4A 0A9 ,","place":["Canada"]},{"name":"Department of Biomedical Engineering, McGill University , Montreal , QC H3A 2B4,","place":["Canada"]},{"name":"Faculty of Dental Medicine and Oral Health Sciences, McGill University , Montreal , QC H3A 1G1,","place":["Canada"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Isabela","family":"Vitienes","sequence":"additional","affiliation":[{"name":"Research Centre, Shriners Hospitals for Children-Canada , Montreal, QC H4A 0A9 ,","place":["Canada"]},{"name":"Department of Biomedical Engineering, McGill University , Montreal , QC H3A 2B4,","place":["Canada"]},{"name":"Faculty of Dental Medicine and Oral Health Sciences, McGill University , Montreal , QC H3A 1G1,","place":["Canada"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Maximillian","family":"Rummler","sequence":"additional","affiliation":[{"name":"Research Centre, Shriners Hospitals for Children-Canada , Montreal, QC H4A 0A9 ,","place":["Canada"]},{"name":"Faculty of Dental Medicine and Oral Health Sciences, McGill University , Montreal , QC H3A 1G1,","place":["Canada"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Annette","family":"Birkhold","sequence":"additional","affiliation":[{"name":"Siemens Healthineers GmbH , 91058 Erlangen ,","place":["Germany"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Frank","family":"Rauch","sequence":"additional","affiliation":[{"name":"Research Centre, Shriners Hospitals for Children-Canada , Montreal, QC H4A 0A9 ,","place":["Canada"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2907-3580","authenticated-orcid":false,"given":"Bettina M","family":"Willie","sequence":"additional","affiliation":[{"name":"Research Centre, Shriners Hospitals for Children-Canada , Montreal, QC H4A 0A9 ,","place":["Canada"]},{"name":"Department of Biomedical Engineering, McGill University , Montreal , QC H3A 2B4,","place":["Canada"]},{"name":"Faculty of Dental Medicine and Oral Health Sciences, McGill University , Montreal , QC 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