Year: 2009
Type: conference-abstract
Abstract: The use of ultrasound in resonators for manipulating particles in various biomedical applications is a relatively well studied topic. These studies were mostly concerned with steady-state processes. However, in certain important applications, such as stirring and mixing fluids in microfluidics and biosensors, the time scale of a process plays a crucial role. Here we consider some of these applications. In particular, the radiation force-induced motion of microparticles and micro-bubbles in a swept-frequency ultrasonic resonator is considered. The particles are forced to move due to switching the resonance modes in a resonator cell, thus providing effective stirring of the fluid. Another field of potential medical application where transient processes are of crucial importance, is ultrasonic treatment of tissues. In this new field of ultrasonic therapy, standing waves can be used for producing lesions in the tissue with simultaneous monitoring the lesion formation by automatic controlling the field parameters. Dynamics of temperature changes in the tissue under the action of a standing ultrasound wave, which is important for optimizing tissue treatment regimes, is evaluated. Experimental data illustrating theoretical results are presented.
DOI: 10.1121/1.3266907
Language: English
Subfield: Biomedical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W4230520419