TY - JOUR
T1 - Dynamic time reversal acoustic focusing of ultrasound for biomedical applications
AU - Sinelnikov, Yegor
AU - Sutin, Alexander
AU - Tsyuryupa, Sergey
AU - Sarvazyan, Armen
PY - 2013
Y1 - 2013
N2 - 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.
AB - 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.
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U2 - 10.1121/1.4800305
DO - 10.1121/1.4800305
M3 - Conference article
AN - SCOPUS:84878992029
SN - 1939-800X
VL - 19
JO - Proceedings of Meetings on Acoustics
JF - Proceedings of Meetings on Acoustics
M1 - 075101
T2 - 21st International Congress on Acoustics, ICA 2013 - 165th Meeting of the Acoustical Society of America
Y2 - 2 June 2013 through 7 June 2013
ER -