Bone evaluation method

Details Bone evaluation method Bone evaluation method

1985-10-31

1988-01-26

Howell, Kyle L.

Surgery

Truss

Pad

378 53, 378 54, 128653, A61B 600

Patent

active

047211121

ABSTRACT:
A method for evaluating bone comprising the steps of: (a) determining a bone pattern (i) by measuring the photodensity of an X-ray photograph from the long bone of a limb or (ii) by photon absorptiometry from the long bone of a limb; (b) smoothing and symmetrizing the bone pattern to modify the same; (c) determining at least one index selected from the group consisting of an index of the bone cortical width (MCI), a bone width (D), a maximum bone density (GSmax), a minimum bone density (GSmin), a bone mineral content (.SIGMA.GS), and an average bone density (.SIGMA.GS/D or .SIGMA.GS/D.sup.2); and (d) evaluating the bone based on the at least one index. The bone evaluation also can be carried out by determining a bone density distribution, from the modified bone pattern obtained above, by setting a bone model having an elliptic bone cross-sectional external shape, a zonate bone cortex, and a bone density decreasing portion in the inside of the bone cortex. The bone evaluation can further be carried out by first obtaining modified patterns in a plurality of portions of the bone at a constant distance and, then, by determining a bone density distribution in each portion from the modified bone pattern in each portion by setting the above-mentioned bone model in each portion. The bone density distribution in each portion is classified, by color, based on the density values, and the X-ray image or photon absorptiometry image is converted to the image of the bone density distribution.

REFERENCES:
patent: 2898466 (1959-08-01), Lintz et al.
patent: 3180985 (1965-04-01), Leighton
patent: 3483565 (1969-12-01), Jaffe et al.
patent: 3715588 (1973-02-01), Rose
patent: 3944830 (1976-03-01), Dissing
patent: 3996471 (1976-12-01), Fletcher et al.
patent: 4515165 (1985-05-01), Carroll
Sorenson et al., "A Reliable In Vivo Measurement of Bone Mineral Content", Journal of Bone and Joint Surgery, vol. 49.A No. 3, pp. 481-497.
Spring et al., "An Apparatus for the Measurement of Bone Mineral Content With Elimination of the Influence of Fat", Commentationes Physico-Mathematicae, vol. 44 pp. 7-14, Sep. 1974.
AGA Thermovision Brochure, 1973.
Jin To Toseki (Kidney and Dialysis), 6, No. 1, p. 49 (1979).
Science, 142, p. 230 (1963).
Clin. Orthop. Rel. Ros., 149, 268 (1980).
Kotsu Taisha 14, pp. 91-104 (1981), with English translation.

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