Title :
Power Doppler ultrasound imaging of red blood cell aggregation
Author :
Cloutier, Guy ; Allard, Louis
Author_Institution :
Lab. of Biomed. Eng., Montreal Univ., Que., Canada
Abstract :
The objective was to evaluate the effect of the shear rate on red blood cell (RBC) aggregation with power Doppler ultrasound (PDU) and color Doppler flow (CDF) imaging. CDF was used to estimate the velocity profile and the shear rate across the tube. PDU was used to estimate the echogenicity of blood and the level of aggregation. The results show that PDU depends on the shear rate and flow rate. The power variations were measured at shear rates below 40 s-1, where RBC aggregation is maximum
Keywords :
Doppler measurement; aggregation; biomedical ultrasonics; blood flow measurement; flow visualisation; haemorheology; image colour analysis; color Doppler flow imaging; echogenicity; gray level; level of aggregation; porcine blood; power Doppler ultrasound imaging; red blood cell aggregation; shear rate effect; transfer function; velocity profile; Aggregates; Biomedical engineering; Biomedical imaging; Instruments; Laboratories; Power measurement; Pulse measurements; Red blood cells; Transfer functions; Ultrasonic imaging;
Conference_Titel :
[Engineering in Medicine and Biology, 1999. 21st Annual Conference and the 1999 Annual Fall Meetring of the Biomedical Engineering Society] BMES/EMBS Conference, 1999. Proceedings of the First Joint
Conference_Location :
Atlanta, GA
Print_ISBN :
0-7803-5674-8
DOI :
10.1109/IEMBS.1999.804131
