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In this paper, an approach for the extraction of quantitative parameters from multi-directional ultrasound echo signal data for the differentiation and characterization of specular reflections and diffuse backscattering is presented and evaluated. Spatially resolved, tissue-characterizing parametric images are calculated by analyzing the envelope of echo signals from different insonation angles. Frames...
In high-frequency ultrasound (HFUS) imaging systems usually mechanically moved single-element fixed-focus transducers are used, and a water path between transducer and the object (tissue area) is required. The speed of sound (SoS) differences of water and tissue causes beam refraction at the boundary. When applying spatial compounding by superposition of B-mode images obtained from different angles...
For ultrasound imaging of small animals often standard systems for human medicine or special high frequency ultrasound systems are used. The former are limited to frequencies below 15 MHz, and therefore their spatial resolution often is not sufficient. High-frequency ultrasound (HFUS) imaging systems working at frequencies up to 40 MHz offer a rather high resolution, but high ultrasound frequencies...
In dermatology, high-frequency ultrasound (HFUS) is used for high-resolution skin imaging. The conventional B-scan type approach is to perform lateral scans perpendicular to the direction of sound propagation. Ultrasound spatial compounding enables improvement of the image contrast, suppression of speckle and noise, and reduction of imaging artifacts in comparison with conventional B-mode imaging,...
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