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Elastography is an emerging ultrasonic imaging technique. A system based on transient elastography is built to measure biological tissues' stiffness in the paper. Then, wavelet de-noising of the displacement estimatation to reduce artifacts due to high overlap in transient elastography is presented. High overlap between data segments is essential to improve axial resolution in transient elastography...
Abstract- Ultrasonic transient elastography for tissue biomechanical parameters (such as shear velocity) measurement has significant clinical applications. The Youngs modulus, which represent the tissue stiffness, is a recognized indicator of many diseases such as liver fibrosis, breast cancer, can be directly calculated from the shear velocity. In order to estimate the shear velocity accurately,...
Elastography is an emerging ultrasonic imaging technique; it has a broad clinical application for tissue parameter estimation. We designed a real-time system to measure tissue stiffness information non-invasively based on transient elastography. The system performance mainly depends on the circuit design before the Analog-to-Digital Converter (A/D), especially the preamplifier part which is very sensitive...
A real-time digital beamformer for high-frequency ( >20 MHz) linear ultrasonic arrays has been developed. The system can handle up to 64-element linear array transducers and excite 16 channels and receive simultaneously at 100 MHz sampling frequency with 8-bit precision. Radio frequency (RF) signals are digitized, delayed, and summed through a real-time digital beamformer, which is implanted using...
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