Abstract
It is well known from the literature1 that velocity fluctuations across the active aperture of a linear array for B-scan-imaging can give rise to image degradation. Various methods have been proposed and tested to compensate for image blurring of this origin. We have investigated a method very similar to the one published by O’Donnel and Flax2 in 1988. Results showing up the merits and limits of our method named “adaptive antenna”3 are to be presented in this report.
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References
D. Hassler, W. Härer, G. Temme, E. Schmidt, P. Wegener, P. Krämmer, Degradation of Image Quality by Sound Velocity Fluctuations and its Dependence on the Aperture Size, in: IEEE Ultrasonics Symposium, B. R. McAvoy, Denver, Vol. 2, 935–938, (1987)
M. O’Donnel, S.W. Flax, Phase-Aberration Correction Using Signals From Point Reflectors and Diffuse Scatterers: Principles & Measurements, in: IEEE Trans. Ultr. Ferr.Freq.Contr., Vol. 35, No.6, 758–774, (Nov. 1988)
German patent P3628220, US patent 4.817.614, priority Aug. 20, (1986)
P. Krämmer, D. Hassler, Measurement of Spatial Time-of Flight Fluctuations of Ultrasound Pulses Passing Through Inhomogeneous Layers, in: IEEE Ultrasonics Symposium, B. R. McAvoy, Denver, Vol. 2, 939–942, (1987)
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© 1992 Springer Science+Business Media New York
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Hassler, D., Härer, W., Temme, G. (1992). Adaptive Beamforming for Correction of Velocity Fluctuations Close to the B-Scan-Array. In: Ermert, H., Harjes, HP. (eds) Acoustical Imaging. Acoustical Imaging, vol 19. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-3370-2_33
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DOI: https://doi.org/10.1007/978-1-4615-3370-2_33
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