| چکیده انگلیسی مقاله |
Background: Previous studies have shown a moderate correlation between the bone mineral density measured by dual-energy x-ray absorptiometry (DXA) and Hounsfield units (HU) assessed on diagnostic CT scans in the lumbar spine. In this study, we aimed to evaluate the correlation between the DXA scores and HU values in different bones and at several anatomic landmarks.
Methods: In a retrospective study, 214 patients who had both a DXA and a diagnostic CT scan of different bones, including the proximal humerus (n=96), distal tibia (n=56), distal femur (n=34), and proximal tibia (n=28) were included. 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.
Results: The HU of the center of medulla was significantly correlated with the lowest T-score in the proximal tibia (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 of the patients (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 medulla in the proximal tibia was significantly smaller in the osteoporotic patients (P=0.036). The mean HU of the posteromedial cortex and center of medulla in the distal tibia were significantly larger in patients with normal BMD (P=0.04 for both).
Conclusion: A moderately significant correlation is observed between the lowest T-score and certain anatomic landmarks of different bones. |
| نویسندگان مقاله |
| Mohammad Reza Bahaeddini
Department of Orthopedics, School of Medicine, Iran University of Medical Sciences, Tehran, Iran.
| Behnam Jafari
Department of Orthopedics, School of Medicine, Iran University of Medical Sciences, Tehran, Iran.
| Masih Rikhtehgar
Department of Orthopedics, School of Medicine, Iran University of Medical Sciences, Tehran, Iran.
| Amir Aminian
Department of Orthopedics, School of Medicine, Iran University of Medical Sciences, Tehran, Iran.
| Pouria Tabrizian
Department of Orthopedics, School of Medicine, Iran University of Medical Sciences, Tehran, Iran.
| Mohammad Sadegh Mirjalily
School of Medicine, Iran University of Medical Sciences, Tehran, Iran.
| Shayan Amiri
Department of Orthopedics, School of Medicine, Iran University of Medical Sciences, Tehran, Iran.
| Javad Khajemozafari
School of Medicine, Shahroud University of Medical Sciences, Shahroud, Iran.
| Hamed Tayyebi
Department of Orthopedics, School of Medicine, Iran University of Medical Sciences, Tehran, Iran.
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