Surgery – Truss – Pad
Patent
1985-05-31
1987-04-21
Howell, Kyle L.
Surgery
Truss
Pad
73599, 73631, A61B 1000
Patent
active
046588272
ABSTRACT:
Both the linear attenuation coefficient and an index describing the heterogeneity of the scatterers of tissue can be obtained simultaneously by the method and system disclosed herein. The system also produces a B-scan image with optimal time-variable gain compensation. The system combines an envelope peak method with a conventional ultrasound pulse-echo scanner. In this method, the peaks of the echo envelopes in a B-scan are multiplied by a controllable gain function. By adjusting the parameter of the gain function, the noise-to-signal ratio (NSR) of the envelope peaks is minimized. The minimum NSR can be used as an index to describe the heterogeneity of the tissue scatterers and the parameter of the gain function corresponding to the minimum NSR is equal to the attenuation coefficient of the tissue.
REFERENCES:
"Ultrasonic Tissue Characterization: A Review," by J. P. Jones et al., in Acta Electronica, vol. 26, Nos. 1-2, 1984.
"Ultrasonic Characterization of Abdominal Tissues via Digital Analysis of Backscattered Waveforms," by F. Graham Sommer, M.D., et al., in Radiology, vol. 141, No. 3, pp. 811-817, Dec. 1981.
"Measurement of Ultrasonic Attenuation Within Regions Selected from B-Scan Images," by Kevin J. Parker et al., in IEEE Transactions on Biomedical Engineering, (vol. BME-30, No. 8, Aug. 1983).
"A Narrowband Pulse-Echo Technique for In Vivo Ultrasonic Attenuation Estimation," by J. Ophir et al., in IEEE Transactions on Biomedical Engineering, vol. BME-32, No. 3, Mar. 1985.
"Attenuation Estimation in Reflection: Progress and Prospects," by J. Ophir et al., in Ultrasonic Imaging 6, pp. 349-395, 1984.
"Spectral Characterization and Attenuation Measurements in Ultrasound," by S. W. Flax et al., in Ultrasonic Imaging 5, pp. 95-116, 1983.
"Clinical Application of an Ultrasound Attenuation Coefficient Estimation Technique for Liver Pathology Characterization," by R. Kuc, in IEEE Transactions on Biomedical Engineering, vol. BME-27, No. 6, Jun. 1980.
Greenleaf James F.
He Ping
Howell Kyle L.
Jaworski Francis J.
Mayo Medical Resources
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