Spectral energy measurements of simulated microemboli of various sizes using a diffraction grating ultrasound probe

William J. Weiss, Sowmya G. Ballakur, Hoang Tran, Sprague W. Hazard, John Blebea

Research output: Contribution to journalConference articlepeer-review

Abstract

This study characterizes the Doppler signal from simulated microemboli of various sizes in blood mimicking fluid using spectral energy parameters. The goal of this research is to detect microemboli as a non-invasive diagnostic tool, or intra-operatively as a surgical aid. A dual beam diffraction-grating ultrasound probe operating at 10 MHz (Model Echoflow BVM-1, EchoCath, Inc., Princeton, NJ) was used with a flow phantom. Microemboli were polystyrene microspheres in 200 to 1000 micron diameters, in concentrations of 0.1, 0.5, and 1.0 per ml. Average flow velocities were 25, 50, 75, and 100 cm/sec. The distribution of peak values of the power spectrum at 2.5 msec windows was plotted over 15 seconds. The means of the distributions corresponding to the microspheres and background fluid were averaged for the four velocity conditions. Embolic peak spectral power ranged from approximately 12 to 25 dB relative to the background. A detection method based on these measurements is currently being developed.

Original languageEnglish (US)
Pages (from-to)471-479
Number of pages9
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume5035
DOIs
StatePublished - Sep 12 2003
EventMedical Imaging 2003: Ultrasonic Imaging and Signal Processing - San Diego, CA, United States
Duration: Feb 18 2003Feb 20 2003

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Fingerprint Dive into the research topics of 'Spectral energy measurements of simulated microemboli of various sizes using a diffraction grating ultrasound probe'. Together they form a unique fingerprint.

Cite this