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Feasibility of Peripheral Bone Densitometry for the Assessment of Bone Density: Comparison with Dual Energy X-ray Absorptiometry of the Axial Skeleton  

Park, Ji-Seon (Department of Radiology, Kyung Hee University Medical Center)
Jin, Wook (Department of Radiology, East-West Neomedical Center, Kyung Hee University)
Park, So-Young (Department of Radiology, East-West Neomedical Center, Kyung Hee University)
Bae, Min-Sun (Department of Radiology, East-West Neomedical Center, Kyung Hee University)
Kim, Doeg-Yoon (Department of Nuclear Medicine, Kyung Hee University Medical Center)
Choe, Bong-Keun (Department of Preventive Medicine, School of Medicine, Kyung Hee University)
Ryu, Kyung-Nam (Department of Radiology, Kyung Hee University Medical Center)
Publication Information
Journal of the Korean Society of Radiology / v.62, no.6, 2010 , pp. 555-561 More about this Journal
Abstract
Purpose: To evaluate the feasibility of peripheral bone densitometry for the assessment of bone density, and to compare it with dual energy X-ray absorptiometry (DXA). Materials and Methods: Radiographic absorptiometry (RA) of the middle phalange, peripheral DXA (pDXA) of the calcaneus, and the DXA were performed for two groups: Group 1 was a normal group of 54 healthy young women and group 2 was a group of 54 postmenopausal women considered to be at a high risk for osteoporosis. For the normal group, RA and pDXA were scanned twice to assess the repeatability of the methods. The Tscores were compared to determine whether there was a correlation between the peripheral and axial bone densitometries. The cutoff values of RA and pDXA for the diagnosis of osteopenia were determined. Results: Each examination showed different T-scores for a given person. The T-scores of RA were higher than those of pDXA for the normal group, whereas the T-scores of pDXA were higher for high-risk group. The coefficients of repeatability were 0.88 in RA and 1.53 in pDXA. The correlation coefficient for DXA was higher in RA than in pDXA. The cutoff values for osteopenia were -1.773 for RA and -1.75 for pDXA, as compared to -1.0 for DXA. Conclusion: The data suggests that RA is a viable screening method for osteoporosis. However, there should be consideration for the fact that bone density depends on examination methods or sites.
Keywords
Absorptiometry, Photon; Bone density; Finger Phalanges; Calcaneus;
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