Title :
A model for ultrasound contrast agent in a phantom vessel
Author :
Qamar, Asif ; Samtaney, Ravi
Author_Institution :
Div. of Phys. Sci. & Eng., King Abdullah Univ. of Sci. & Technol. (KAUST), Thuwal, Saudi Arabia
Abstract :
A theoretical framework to model the dynamics of Ultrasound Contrast Agent (UCA) inside a phantom vessel is presented. The model is derived from the reduced Navier-Stokes equation and is coupled with the evolving flow field solution inside the vessel by a similarity transformation approach. The results are computed, and compared with experiments available in literature, for the initial UCA radius of Ro=1.5 μm and 2 μm for the vessel diameter of D=12 μm and 200 μm with the acoustic parameters as utilized in the experiments. When compared to other models, better agreement on smaller vessel diameter is obtained with the proposed coupled model. The model also predicts, quite accurately, bubble fragmentation in terms of acoustic and geometric parameters.
Keywords :
Navier-Stokes equations; biomedical ultrasonics; phantoms; Navier-Stokes equation; acoustic parameters; bubble fragmentation; flow field solution; geometric parameters; phantom vessel; similarity transformation approach; ultrasound contrast agent; Acoustics; Biomedical imaging; Computational modeling; Electron tubes; Equations; Mathematical model; Ultrasonic imaging;
Conference_Titel :
Biomedical Engineering (MECBME), 2014 Middle East Conference on
Conference_Location :
Doha
DOI :
10.1109/MECBME.2014.6783238