Title :
Detection of simulated microemboli using a diffraction grating ultrasound probe and spectral energy criteria
Author :
Ballakur, Sowmya G. ; Blebea, John ; Hazard, Sprague W. ; Zickler, Robert ; Weiss, William J.
Author_Institution :
Dept. of Bioeng., Pennsylvania State Univ., Hershey, PA, USA
Abstract :
A new high frequency diffraction grating ultrasound probe was used to detect simulated microemboli under physiological (venous) flow conditions across different particle concentrations and velocities. Signal processing algorithms developed use spectral energy criteria and statistically determined decision criteria for the quantification of the detected particles
Keywords :
Fourier transforms; biomedical transducers; biomedical ultrasonics; haemodynamics; medical signal processing; probability; signal sampling; spectral analysis; time-frequency analysis; Doppler echoes; blood circulation; blood clots; blood vessels; continuous wave Doppler system; diffraction grating transducer; diffraction grating ultrasound probe; hard plaque; high frequency ultrasound probe; joint time-frequency equivalent; linear regression; peak spectral density; physiological flow conditions; probability distributions; short time Fourier transform; signal processing algorithms; simulated microemboli detection; small air bubbles; soft plaque; solid particulate matter; spectral energy criteria; statistically determined decision criteria; Backscatter; Diffraction gratings; Embolization; Fourier transforms; Frequency; Probes; Signal analysis; Solids; Surgery; Ultrasonic imaging;
Conference_Titel :
Bioengineering Conference, 2002. Proceedings of the IEEE 28th Annual Northeast
Conference_Location :
Philadelphia, PA
Print_ISBN :
0-7803-7419-3
DOI :
10.1109/NEBC.2002.999516
