en تروما Trauma پژوهشی Research Article <div style="text-align: justify;"><strong>Background</strong>: Previous studies have shown a moderate correlation between bone mineral density (BMD) measured by dual-energy x-ray absorptiometry (DEXA) and Hounsfield units (HU) assessed on diagnostic computed tomography (CT) scans in the lumbar spine.&nbsp;<br> <strong>Objectives</strong>: In this study, we aimed to evaluate the correlation between DEXA scores and HU values for different bones and several anatomical landmarks.<br> <strong>Methods</strong>: In this retrospective study, 214 patients underwent DEXA and diagnostic CT scans of different bones, including the proximal humerus (n=96), distal tibia (n=56), distal femur (n=34), and proximal tibia (n=28). HU values of five anatomic landmarks, including the medulla, anteromedial cortex, anterolateral cortex, posteromedial cortex, and posterolateral cortex, were measured, and their correlation with the lowest T-score of the patients was assessed.<br> <strong>Results</strong>: The HU of the center of the medulla was significantly correlated with the lowest T-score in the proximal (r=0.486, P=0.04) and distal tibia (r=0.458, P=0.01). In the proximal humerus, the HU of the anteromedial cortex was significantly correlated with the lowest T-score (r=0.0353, P=0.01). The mean HU of the posterolateral cortex in the proximal humerus was significantly smaller in the osteoporotic patients (P=0.003). The mean HU of the center of the medulla in the proximal tibia was significantly lower in patients with &lrm;osteoporotic (P=0.036). The mean HU values of the posteromedial cortex and center of the medulla in the distal tibia were significantly larger in patients with normal BMD (P=0.04 both).&nbsp;<br> <strong>Conclusion</strong>: A moderately significant correlation is observed between the lowest T-score and specific anatomical landmarks of the different bones.&nbsp;</div> Dual-energy x-ray absorptiometry, Bone mineral density (BMD), Hounsfield unit (HU), Computed tomography scan (CT) 135 144 http://jros.iums.ac.ir/browse.php?a_code=A-10-400-2&slc_lang=en&sid=1 Mohammad Reza Bahaeddini mrbahaeddini@yahoo.com 10031947532846007529 10031947532846007529 No Department of Orthopedics, School of Medicine, Iran University of Medical Sciences, Tehran, Iran. Behnam Jafari jafaribehnam1371@gmail.com 10031947532846007530 10031947532846007530 No Department of Orthopedics, School of Medicine, Iran University of Medical Sciences, Tehran, Iran. Masih Rikhtehgar masih.rikhtehgar84.mr@gmail.com 10031947532846007531 10031947532846007531 No Department of Orthopedics, School of Medicine, Iran University of Medical Sciences, Tehran, Iran. Amir Aminian amir_aminian@yahoo.com 10031947532846007532 10031947532846007532 No Department of Orthopedics, School of Medicine, Iran University of Medical Sciences, Tehran, Iran. Pouria Tabrizian tebrizian.pouria@gmail.com 10031947532846007533 10031947532846007533 No Department of Orthopedics, School of Medicine, Iran University of Medical Sciences, Tehran, Iran. Mohammad Sadegh Mirjalily mirjalili.m@iums.ac.ir 10031947532846007534 0009-0002-2024-5788 No Department of Orthopedics, School of Medicine, Iran University of Medical Sciences, Tehran, Iran. Shayan Amiri amiri.shayan23@gmail.com 10031947532846007535 10031947532846007535 No Department of Orthopedics, School of Medicine, Iran University of Medical Sciences, Tehran, Iran. Javad Khaje Mozafari mozafari.ortho@gmail.com 10031947532846007536 10031947532846007536 No Department of Orthopedics, School of Medicine, Iran University of Medical Sciences, Tehran, Iran. Hamed Tayyebi hamedtayebi65@gmail.com 10031947532846007537 10031947532846007537 Yes Department of Orthopedics, School of Medicine, Iran University of Medical Sciences, Tehran, Iran.