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We propose a new compressive imaging method for reconstructing 2D or 3D objects from their scattered wave-field measurements. Our method relies on a novel, nonlinear measurement model that can account for the multiple scattering phenomenon, which makes the method preferable in applications where linear measurement models are inaccurate. We construct the measurement model by expanding the scattered...
In non-invasive ultrasound (US) imaging, diagnosis of Nonalcoholic Fatty Liver Disease (NAFLD) often depends on the subjective judgment of the image brightness and speckle uniformity. In order to assist the differentiation between the NAFLD and the normal liver in US diagnoses, quantitative tissue characterization based on acoustic backscattering behaviors are performed using high-frequency US system...
Deep brain stimulation, as a primary surgical treatment for various neurological disorders, involves implanting electrodes to stimulate target nuclei within millimeter accuracy. Accurate pre-operative target selection is challenging due to the poor contrast in its surrounding region in MR images. In this paper, we present a learning-based method to automatically and rapidly localize the target using...
This paper proposes a fully-integrated 860-GHz terahertz wave sensor. The sensor integrates a terahertz detector and readout circuit in 180-nm standard CMOS process. The readout circuit consists of a low-noise instrumentation amplifier and a high-resolution AZ-ADC. Transmissive imaging without source modulation (no lock-in technique required) is realized using the sensor. The detector consists of...
Three-dimensional imaging of sonar has important application in the fields of precise navigation and target recognition. In the paper, we describe an efficient model to compute the backscattering sound of high-frequency from complex underwater target for simulating the 3D image based on sidescan sonar. The target we used is the Generic submarine model which was designed by German FWG workshop. The...
In the imaging algorithms of Inverse Synthetic Aperture Sonar (ISAS), Range-Doppler Algorithm (RDA) and Polar Formation Algorithm (PFA) can be only suitable for far-field imaging. For obtaining near-field imaging, Computed Tomography Algorithm (CTA) is introduced. Five point-targets in near-field at different locations are imaged with RDA, PFA and CTA, respectively. Imaging results show that five...
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