Ultrasonic measurement method and apparatus therefor

Details Ultrasonic measurement method and apparatus therefor Ultrasonic measurement method and apparatus therefor

1985-04-22

1986-07-01

Ciarlante, Anthony V.

Measuring and testing

Vibration

By mechanical waves

73626, G01N 2904

Patent

active

045972923

ABSTRACT:
An ultrasonic transducer is adapted to transmit spherical ultrasonic waves which have a plurality of frequencies into an object under examination while being scanned in a direction at right angles to the direction of transmission. By repeating this operation, echo signals are obtained, on the basis of which a B-scan distribution image of the echo signals is obtained through use of a synthetic aperture method. Using the distribution image, there is determined position information relating to positions of interest in the object as indicated in the distribution image, as well as scanning positions of the ultrasonic transducer situated on extensions of straight lines connecting the positions of interest. The attenuation coefficient of the object is measured based on echo signals at the scanning positions.

REFERENCES:
patent: 4545250 (1985-10-01), Miwa
patent: 4546772 (1985-10-01), Flax
Radar Handbook by Merrill I. Skolnik.
Ultrasonic Material Testing, Revised Edition; Edited by Japan Society for the Promotion of Science.
Ultrasonic Synthetic Aperture Imaging with Nonlinear Processing Flat Detection by Synthetic Aperture Ultrasonic Imaging Method.
Journal of the Acoustical Society of America, vol. 69, No. 6, Jun. 1981, pp. 1838-1840, Acoust. Soc. Am., N.Y., US; Y. Hayakawa et al: Multifrequency Echoscopy for Quantitative Acoustical Characterization of Living Tissues.
T. Sato et al: Super-Resolution Ultrasonic Imaging by Combined Spectral and Aperture Synthesis, vol. 64, No. 2, Aug. 1977, pp. 341-345.
1972 IEEE Ultrasonics Symposium Proceedings, 72 CHO 708-8 SU, pp. 81-86, N.Y., US: E. P. Papadakis et al: New Uses of Ultrasonic Spectrum Analysis.

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