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Super-resolution in wave imaging

Abstract : Different modalities in wave imaging each present limitations in terms of resolution or contrast. In this work, we present a mathematical model of the ultrafast ultrasound imaging modality and reconstruction methods which can improve contrast and resolution in ultrasonic imaging. We introduce two methods which allow to improve contrast and to locate blood vessels belowthe diffraction limit while simultaneously estimating the blood velocity. We also present a reconstruction method in electrical impedance tomography which allows reconstruction of microscopic parameters from multi-frequency measurements using the theory of homogenization.
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https://tel.archives-ouvertes.fr/tel-01824936
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Timothée Wintz. Super-resolution in wave imaging. Signal and Image processing. PSL Research University, 2017. English. ⟨NNT : 2017PSLEE052⟩. ⟨tel-01824936⟩

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