Dynamic time reversal acoustic focusing of ultrasound for biomedical applications

Yegor Sinelnikov, Alexander Sutin, Sergey Tsyuryupa, Armen Sarvazyan

Research output: Contribution to journalConference articlepeer-review

Abstract

Time Reversal Acoustic (TRA) system provides effective focusing in inhomogeneous media that can be used in various biomedical applications including high intensity ultrasound treatment, ultrasound-assisted drug delivery, ultrasonic battery charging of implants, etc. In many cases the temporal variation of propagating media properties leads to a degradation of the focusing. The in situ adjustment of radiated TRA signal is required in order to restore focusing. We present the feedback algorithm with Tikhonov regularization that enables the refocusing of acoustic field based on the changes in the focused signal received by a beacon. Temporal and spatial quality of the feedback refocusing was characterized experimentally using hydrophone and compared with standard TRA focusing. Algorithm is applicable for power delivery to implantable wireless cardiac pacemakers, percutaneous devices and neuro-stimulators.

Original languageEnglish
Article number075101
JournalProceedings of Meetings on Acoustics
Volume19
DOIs
StatePublished - 2013
Event21st International Congress on Acoustics, ICA 2013 - 165th Meeting of the Acoustical Society of America - Montreal, QC, Canada
Duration: 2 Jun 20137 Jun 2013

Fingerprint

Dive into the research topics of 'Dynamic time reversal acoustic focusing of ultrasound for biomedical applications'. Together they form a unique fingerprint.

Cite this