Publications by authors named "Thomas F Wenisch"
High-Volume-Rate 3-D Ultrasound Imaging Based on Synthetic Aperture Sequential Beamforming With Chirp-Coded Excitation.
IEEE Trans Ultrason Ferroelectr Freq Control
August 2018
Article Synopsis
- 3-D ultrasound imaging is a valuable technique for medical applications but often produces too much data to be practical for portable use.
- The paper introduces a method called synthetic aperture sequential beamforming (SASB), which compresses the data and enhances volume rate while maintaining image quality by using four subapertures and linear chirps.
- The proposed system successfully increases the volume rate from 8.56 to 34.2 volumes per second, demonstrating imaging quality on par with existing methods in both shallow and deep regions.
We have investigated limited angle transmission tomography to estimate speed of sound (SOS) distributions for breast cancer detection. That requires both accurate delineations of major tissues, in this case by segmentation of prior B-mode images, and calibration of the relative positions of the opposed transducers. Experimental sensitivity evaluation of the reconstructions with respect to segmentation and calibration errors is difficult with our current system.
View Article and Find Full Text PDFLow-Cost 3-D Flow Estimation of Blood With Clutter.
IEEE Trans Ultrason Ferroelectr Freq Control
May 2017
Article Synopsis
- Volumetric flow rate estimation is key in ultrasound imaging for diagnosing cardiovascular diseases, integrating velocity estimates to assess blood flow.
- Speckle tracking improves upon traditional Doppler methods but faces challenges with lateral resolution and clutter, which can affect accuracy.
- The paper introduces efficient techniques for velocity estimation and clutter filtering that enhance accuracy while reducing computational demands, achieving notable results in various flow scenarios.