Title :
The effects of system parameters and tissue properties on high frequency flow imaging of the microcirculation
Author :
Goertz, D.E. ; Burns, P.N. ; Foster, F.S.
Author_Institution :
Dept. of Med. Biophys., Toronto Univ., Ont., Canada
Abstract :
High frequency flow imaging methods are emerging as tools that can provide unique information about blood flow in the microcirculation. In this study, simulations are conducted to investigate the effects of system parameters and tissue properties on the expected blood to tissue power ratio (BTR) for microvessels located along the axis of a spherically focused single element transducer. Results are shown which illustrate the effects of f-number, bandwidth, center frequency, vessel caliber and vessel orientation. These factors can have a significant impact on sensitivity and the quantitative interpretation of high frequency flow imaging data
Keywords :
biomedical ultrasonics; blood flow measurement; blood vessels; image resolution; medical image processing; transient response; bandwidth effect; beam model; blood flow; center frequency; expected blood to tissue power ratio; f-number effect; high frequency flow imaging; microcirculation imaging; microvessels; quantitative interpretation; sensitivity; spatial resolution; spherically focused single element transducer; system parameters effect; tissue properties effect; vessel caliber; vessel orientation; Acoustic beams; Acoustic scattering; Attenuation; Blood flow; Focusing; Frequency estimation; High-resolution imaging; Pulse measurements; Spatial resolution; Ultrasonic imaging;
Conference_Titel :
Ultrasonics Symposium, 2000 IEEE
Conference_Location :
San Juan
Print_ISBN :
0-7803-6365-5
DOI :
10.1109/ULTSYM.2000.921619
