Bone assessment apparatus and method

Details Bone assessment apparatus and method Bone assessment apparatus and method

1994-07-21

1995-07-18

Jaworski, Francis

Surgery

Truss

Pad

73599, A61B 800, G01N 2904

Patent

active

054332036

ABSTRACT:
A bone assessment apparatus provides a precise bone assessment based on the attenuation factor of an ultrasonic wave which has passed through a bone of a patient. A transmitting transducer and a receiving transducer are positioned at either side of the bone respectively, and an ultrasonic wave is irradiated to the bone, and passes therethrough. A transmitter/receiver provides an attenuation spectrum of the ultrasonic wave and determines a reference frequency f.sub.p peculiar to the patient at which the attenuation factor is minimum. A gradient .DELTA. of the attenuation spectrum is calculated based on the difference between the attenuation factor .alpha..sub.p at the reference frequency f.sub.p and the attenuation factor .alpha..sub.q at a frequency f.sub.q which is spaced apart by a predetermined value from the reference frequency f.sub.p. A density index .rho..sub.I is also calculated which is a gradient of the attenuation spectrum per unit thickness of the bone.

REFERENCES:
patent: 3847141 (1974-12-01), Hoop
patent: 4202215 (1980-05-01), Meyer
patent: 4594895 (1986-06-01), Fujii
patent: 4774959 (1988-10-01), Palmer et al.
patent: 4930511 (1990-06-01), Rossman et al.
patent: 5042489 (1991-08-01), Wiener et al.
patent: 5054490 (1991-10-01), Rossman et al.
patent: 5099849 (1992-03-01), Rossman et al.
patent: 5218963 (1993-06-01), Mazess
patent: 5361767 (1984-11-01), Yakov
Ophir, J. et al. "Attenuation Estimation in Reflection Progress & Prospects"; UTS Imaging V6 pp.349-395 (1984).
Andre et al., "Measurement of the velocity of ultrasound in the Human Femur in vivo," 2389 Med. Phy. pp. 324-330, vol. 7 (1980) Jul./Aug., No. 4, N.Y.

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