Communications – electrical: acoustic wave systems and devices – Echo systems
Patent
1985-03-14
1987-02-17
Farley, Richard A.
Communications, electrical: acoustic wave systems and devices
Echo systems
73599, 73602, G01N 2900
Patent
active
046445102
ABSTRACT:
The acoustic characteristics, particularly the attenuation coefficient, internally of a object undergoing examination are measured on the basis of ultrasonic echo pulse, and diminishing the influence of the sound field. Standard media having attenuation coefficients that differ from one another are measured in advance by a predetermined method to find the attenuation rates and attenuation coefficients thereof. The attenuation coefficient of the object is taken to be the attenuation coefficient of one of the standard media that minimizes a difference between the attenuation rate of each standard media and the attenuation rate of the object, which is measured based on an ultrasonic echo signal from within the object.
REFERENCES:
patent: 4414850 (1983-11-01), Miwa et al.
"Quantitative Volume Backscatter Imaging", M. O'Donnell IEEE Transactions on Sonics and Ultrasonics, vol. 30, #1 (1983).
"A Beam Corrected Estimation of the Frequency Dependent Attenuation of Biological Tissue from Backscattered Ultrasound", MJ. T. M. Cloostermans et al., Ultrasonic Imaging, vol. 5 (1983).
Handbook of Ultrasonic Technology, p. 49, The Nikkan Kogyo Shimbun Ltd.
"Oil-In-Gelatin Dispersions for use as Ultrasonically Tissue-Mimicking Materials" by Ernest L. Madsen, Ultrasound in Medicine AND Biology, vol. 8, No. 3 (1982).
"Tissue Mimicking materials for Ultrasound Phantoms" by Ernest L. Madsen in Medical Physics, vol. 5, No. 5 (1978).
Farley Richard A.
Terumo Kabushiki Kaisha
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