Nonlinear Parameter Tomography, Active Incoherent Imaging And Adaptive Imaging For Ultrasonic Tissue Characterization

Takuso Sato; Makoto Hirama; Takayoshi Yokota; Nobuyuki Ichida

doi:10.1117/12.934684

1 November 1982 Nonlinear Parameter Tomography, Active Incoherent Imaging And Adaptive Imaging For Ultrasonic Tissue Characterization

Takuso Sato, Makoto Hirama, Takayoshi Yokota, Nobuyuki Ichida

Author Affiliations +

Proceedings Volume 0375, Medical Imaging and Image Interpretation; (1982) https://doi.org/10.1117/12.934684
Event: 1st International Symposium on Medical Imaging and Image Interpretation, 1982, Berlin, Germany

Abstract

In this paper, three new ultrasonic iaginc, techniques aiming at more exact characterization of tissue are presented. First, new ton ographic imaging system of nonlinear parameter B/A is proposed. Scanning low frequency pumping waves and high frequency probing waves are used. Several images of biological objects and their interpretation are given. Second, a method of active incoherent imaging which is effective both for diffusive and specular objects is shown. A scanning transmitter and array reciever and 2-D nonlinear spectral estimation are used. Finally, an active adaptive imaging method through an unknown inhomogeneous layer is given. It is based on the eigen vector decomposition of the recieved data matrix. The degree of focusing is judged and the best beam is formed. Experimental results are shown as well as numerical results.

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Takuso Sato, Makoto Hirama, Takayoshi Yokota, and Nobuyuki Ichida "Nonlinear Parameter Tomography, Active Incoherent Imaging And Adaptive Imaging For Ultrasonic Tissue Characterization", Proc. SPIE 0375, Medical Imaging and Image Interpretation, (1 November 1982); https://doi.org/10.1117/12.934684

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