A new method for estimating in vivo bone mineral density (BMD) and characterizing the shape of cancellous bone has been proposed using the results of ultrasonic inspection for the diagnosis of osteoporosis. The method is based on two-dimensional bone area fraction S (percent bone area between bone and bone marrow) calculated from the difference in the speed of ultrasonic wave propagation through cancellous bone. It was shown that the two-dimensional area fraction of a heel bone gives a good relationship to the BMD by DXA (dual energy x-ray absorptiometry) testing of human heel bone (calcaneus) and spine (vertebrae lumbar), as expressed by the relation, BMD (g/cm2) = 0.0167S for heel bone (r = 0.83), and BMD (g/cm2) = 0.0254S + 0.123 for the spine (r = 0.77). Shape characterization is based on the image simulation procedure employing eight random variables from a computer and the statistical results of fractal analysis for numerous cancellous bone patterns. We also demonstrate the validity of the shape characterization technique using autopsy specimens as a diagnostic tool for osteoporosis.
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June 1999
Technical Papers
Estimation of in Vivo Bone Mineral Density (BMD) and Shape Characterization for Diagnosing Osteoporosis by Ultrasonic Inspection
F. Nogata,
F. Nogata
Department of Mechanical and Systems Engineering, Faculty of Engineering, Gifu University, 501-1193, Gifu, Japan
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K. Kagechika,
K. Kagechika
Toyama-ken Koshi Rehabilitation Hospital, 931, Toyama, Japan
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Y. Sueyoshi,
Y. Sueyoshi
Department of Orthopedic Surgery, National Hospital of Kanazawa, 920, Kanazawa, Japan
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K. Tomita
K. Tomita
Department of Orthopedic Surgery, School of Medicine, Kanazawa University, 930, Kanazawa, Japan
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F. Nogata
Department of Mechanical and Systems Engineering, Faculty of Engineering, Gifu University, 501-1193, Gifu, Japan
K. Matsui
Sensa Corp., 924, Kanazawa, Japan
K. Kagechika
Toyama-ken Koshi Rehabilitation Hospital, 931, Toyama, Japan
Y. Sueyoshi
Department of Orthopedic Surgery, National Hospital of Kanazawa, 920, Kanazawa, Japan
K. Tomita
Department of Orthopedic Surgery, School of Medicine, Kanazawa University, 930, Kanazawa, Japan
J Biomech Eng. Jun 1999, 121(3): 298-303 (6 pages)
Published Online: June 1, 1999
Article history
Received:
August 27, 1997
Revised:
October 20, 1998
Online:
October 30, 2007
Citation
Nogata, F., Matsui, K., Kagechika, K., Sueyoshi, Y., and Tomita, K. (June 1, 1999). "Estimation of in Vivo Bone Mineral Density (BMD) and Shape Characterization for Diagnosing Osteoporosis by Ultrasonic Inspection." ASME. J Biomech Eng. June 1999; 121(3): 298–303. https://doi.org/10.1115/1.2798323
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