Surgery – Truss – Pad
Patent
1985-02-19
1987-03-03
Howell, Kyle L.
Surgery
Truss
Pad
73599, A61B 1000
Patent
active
046467483
ABSTRACT:
In a method and apparatus for ultrasonic measurement, an ultrasonic pulse is transmitted into a object and received as an echo signal following reflection within the object, and the acoustic characteristic of the object is measured based on object position and frequency information contained in the echo signal. The measured acoustic characteristic is representative of information relating to degree of attenuation and frequency dependence thereof inside the object and obtained from the position and frequency information contained in the echo signal. The apparatus according to this invention displays an image of the distribution of the object acoustic characteristic obtained from the measured acoustic characteristic.
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Journal of the Acoustical Society of America, vol. 69, No. 6, Jun. 1981, pp. 1838-1840, "Multifrequency Echoscopy for Quantitative Acoustical Characterization of Living Tissues" Y. Hayakawa et al.
IEEE Transactions on Acoustics, Speech and Signal Processing, vol. ASSP-32, No. 1, Feb. 1984, pp. 1-6, _"Estimating Acoustic Attenuation from Reflected Ultrasound Signals; Comparison of Spectral-shift and Spectral-difference Approaches" R. Kuc.
Fujii Tadashi
Ishizuka Yoshizo
Howell Kyle L.
Jaworski Francis J.
Terumo Kabushiki Kaisha
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