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Characterization of Reflector Types by Phase-Sensitive Ultrasonic Data Processing and Imaging

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Abstract

Ultrasonic and radar imaging techniques are limited in resolution by the wavelength in the material, yet information beyond those limits is hidden in complex frequency dependent reflection coefficients. The analysis of the phase of complex reflection coefficients together with the properties of imaging algorithms can help to characterize and to classify indications of defects in concrete buildings. This paper describes a method to extract phase information from measurements and SAFT reconstructed images. The influencing factors like material properties, transducer characteristics, and imaging algorithms based on Born or Physical Optics approximations are elaborated. Simulated and experimental results are briefly discussed.

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Correspondence to Klaus Mayer.

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Mayer, K., Langenberg, KJ., Krause, M. et al. Characterization of Reflector Types by Phase-Sensitive Ultrasonic Data Processing and Imaging. J Nondestruct Eval 27, 35–45 (2008). https://doi.org/10.1007/s10921-008-0035-3

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