Title :
Color Doppler imaging of acoustic streaming in blood and clot
Author :
Shi, Xuegong ; Martin, Roy W. ; Vaezy, Shahram ; Crum, Lawrence
Author_Institution :
Center for Bioeng., Washington Univ., Seattle, WA, USA
Abstract :
Acoustic streaming was generated in blood during coagulation using high intensity focused ultrasound (HIFU) and imaged in real-time with regular color Doppler imaging. The streaming velocity was measured at various time points during the coagulation process until a clot was well formed. In unclotted blood the mean streaming velocity was 3.8 cm/s. During the clot formation the velocity decreased gradually to 1.6 cm/s and the reverse flow disappeared entirely. The changes in velocity magnitude and flow pattern appear to provide a method to differentiate clots from fluidic blood and estimate the state of coagulation
Keywords :
Doppler measurement; biomedical ultrasonics; blood; coagulation; acoustic streaming; blood coagulation; clot; coagulation state estimation; flow pattern; fluidic blood; high intensity focused ultrasound; real-time imaging; reverse flow; Acoustic imaging; Acoustic measurements; Blood; Coagulation; Focusing; Streaming media; Time measurement; Ultrasonic imaging; Ultrasonic variables measurement; Velocity measurement;
Conference_Titel :
Ultrasonics Symposium, 1999. Proceedings. 1999 IEEE
Conference_Location :
Caesars Tahoe, NV
Print_ISBN :
0-7803-5722-1
DOI :
10.1109/ULTSYM.1999.849239
