{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,6]],"date-time":"2026-10-06T05:12:41Z","timestamp":1791263561838,"version":"4.1.0"},"reference-count":45,"publisher":"Wiley","issue":"8","license":[{"start":{"date-parts":[[2010,7,28]],"date-time":"2010-07-28T00:00:00Z","timestamp":1280275200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"name":"GDR CNRS 2207"},{"name":"GDR STIC Sant\u00e9 research group"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Medical Physics"],"published-print":{"date-parts":[[2010,8]]},"abstract":"<jats:sec><jats:title>Purpose:<\/jats:title><jats:p>Trabecular bone microarchitecture is made of a complex network of plate and rod structures evolving with age and disease. The purpose of this article is to propose a new 3D local analysis method for the quantitative assessment of parameters related to the geometry of trabecular bone microarchitecture.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods:<\/jats:title><jats:p>The method is based on the topologic classification of the medial axis of the 3D image into branches, rods, and plates. Thanks to the reversibility of the medial axis, the classification is next extended to the whole 3D image. Finally, the percentages of rods and plates as well as their mean thicknesses are calculated. The method was applied both to simulated test images and 3D micro\u2010CT images of human trabecular bone.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results:<\/jats:title><jats:p>The classification of simulated phantoms made of plates and rods shows that the maximum error in the quantitative percentages of plate and rods is less than 6% and smaller than with the structure model index (SMI). Micro\u2010CT images of human femoral bone taken in osteoporosis and early or advanced osteoarthritis were analyzed. Despite the large physiological variability, the present method avoids the underestimation of rods observed with other local methods. The relative percentages of rods and plates were not significantly different between osteoarthritis and osteoporotic groups, whereas their absolute percentages were in relation to an increase of rod and plate thicknesses in advanced osteoarthritis with also higher relative and absolute number of nodes.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions:<\/jats:title><jats:p>The proposed method is model\u2010independent, robust to surface irregularities, and enables geometrical characterization of not only skeletal structures but entire 3D images. Its application provided more accurate results than the standard SMI on simple simulated phantoms, but the discrepancy observed on the advanced osteoarthritis group raises questions that will require further investigations. The systematic use of such a local method in the characterization of trabecular bone samples could provide new insight in bone microarchitecture changes related to bone diseases or to those induced by drugs or therapy.<\/jats:p><\/jats:sec>","DOI":"10.1118\/1.3447728","type":"journal-article","created":{"date-parts":[[2010,7,30]],"date-time":"2010-07-30T23:35:12Z","timestamp":1280532912000},"page":"4364-4376","source":"Crossref","is-referenced-by-count":21,"title":["Local plate\/rod descriptors of 3D trabecular bone micro\u2010CT images from medial axis topologic analysis"],"prefix":"10.1002","volume":"37","author":[{"given":"Fran\u00e7oise","family":"Peyrin","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Dominique","family":"Attali","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Christine","family":"Chappard","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Claude Laurent","family":"Benhamou","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2010,7,28]]},"reference":[{"key":"e_1_2_8_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0140-6736(02)08657-9"},{"key":"e_1_2_8_3_1","first-page":"1467","article-title":"Bone mineral density and clinical hand osteoarthritis in elderly men and women: The Rancho Bernardo study","volume":"29","author":"Schneider D. 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