Publications by authors named "Richard Sampson"
Background: New patient-centered models of care are needed to individualize care and reduce high-cost care, including emergency department (ED) visits and hospitalizations for low- and intermediate-acuity conditions that could be managed outside the hospital setting. Community paramedics (CPs) have advanced training in low- and high-acuity care and are equipped to manage a wide range of health conditions, deliver patient education, and address social determinants of health in the home setting. The objective of this trial is to evaluate the effectiveness and implementation of the Care Anywhere with Community Paramedics (CACP) program with respect to shortening and preventing acute care utilization.
View Article and Find Full Text PDFHigh-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.
A procedure has been developed to analyze the trace element concentrations in glass fragments using particle-induced X-ray emission (PIXE) spectrometry. This method involves using accelerated protons to excite inner-shell electronic transitions of target atoms and recording the resultant X-rays to characterize the trace element concentrations. The protocol was able to identify those glass fragments that originated from different sources based on their elemental analyses.
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