Cavitation-induced streaming in shock wave lithotripsy

Yuri Pishchalnikov, James McAteer

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Cavitation generated by lithotripter shock waves (SWs) in non-degassed water was studied using a 60 frames-per-second camcorder-recording the migration of microbubbles over successive SWs. Lithotripter SWs were produced using a Dornier DoLi-50 electromagnetic lithotripter at 0.5 and 2Hz pulse repetition frequency (PRF). Cavitation was affected by PRF and by the power level (PL) of the lithotripter. At slow PRF, such as shots fired many seconds apart, cavitation was relatively sparse and bubble clouds flowed in the direction of SW propagation. When PRF was increased, the bubble clouds generated by one SW were amplified by subsequent SWs. Cloud amplification was accompanied by an apparent change in the pattern of bubble migration. Whereas bubbles continued to enter the field of view from the prefocal side, the main bubble cloud remained near the focal point. This was due to a streaming of bubbles opposite to the direction of SW propagation. Increasing the PL grew the cavitation field and enhanced the flow of bubbles opposite to the direction of SW propagation. Stepping up the PL acted to push the broad cloud progressively pre-focally (toward the SW source), shifting the position of the plane at which the opposing directional bubble flows collided.

Original languageEnglish
Title of host publicationProceedings of Meetings on Acoustics
Volume19
DOIs
StatePublished - 2013
Externally publishedYes
Event21st International Congress on Acoustics, ICA 2013 - 165th Meeting of the Acoustical Society of America - Montreal, QC, Canada
Duration: Jun 2 2013Jun 7 2013

Other

Other21st International Congress on Acoustics, ICA 2013 - 165th Meeting of the Acoustical Society of America
CountryCanada
CityMontreal, QC
Period6/2/136/7/13

Fingerprint

cavitation flow
shock waves
bubbles
shock wave propagation
repetition
pulses
shot
field of view
recording
electromagnetism
water

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

Cite this

Pishchalnikov, Y., & McAteer, J. (2013). Cavitation-induced streaming in shock wave lithotripsy. In Proceedings of Meetings on Acoustics (Vol. 19). [075032] https://doi.org/10.1121/1.4800374

Cavitation-induced streaming in shock wave lithotripsy. / Pishchalnikov, Yuri; McAteer, James.

Proceedings of Meetings on Acoustics. Vol. 19 2013. 075032.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Pishchalnikov, Y & McAteer, J 2013, Cavitation-induced streaming in shock wave lithotripsy. in Proceedings of Meetings on Acoustics. vol. 19, 075032, 21st International Congress on Acoustics, ICA 2013 - 165th Meeting of the Acoustical Society of America, Montreal, QC, Canada, 6/2/13. https://doi.org/10.1121/1.4800374
Pishchalnikov Y, McAteer J. Cavitation-induced streaming in shock wave lithotripsy. In Proceedings of Meetings on Acoustics. Vol. 19. 2013. 075032 https://doi.org/10.1121/1.4800374
Pishchalnikov, Yuri ; McAteer, James. / Cavitation-induced streaming in shock wave lithotripsy. Proceedings of Meetings on Acoustics. Vol. 19 2013.
@inproceedings{74c0a65542c94f7f8586248f09ebcdc5,
title = "Cavitation-induced streaming in shock wave lithotripsy",
abstract = "Cavitation generated by lithotripter shock waves (SWs) in non-degassed water was studied using a 60 frames-per-second camcorder-recording the migration of microbubbles over successive SWs. Lithotripter SWs were produced using a Dornier DoLi-50 electromagnetic lithotripter at 0.5 and 2Hz pulse repetition frequency (PRF). Cavitation was affected by PRF and by the power level (PL) of the lithotripter. At slow PRF, such as shots fired many seconds apart, cavitation was relatively sparse and bubble clouds flowed in the direction of SW propagation. When PRF was increased, the bubble clouds generated by one SW were amplified by subsequent SWs. Cloud amplification was accompanied by an apparent change in the pattern of bubble migration. Whereas bubbles continued to enter the field of view from the prefocal side, the main bubble cloud remained near the focal point. This was due to a streaming of bubbles opposite to the direction of SW propagation. Increasing the PL grew the cavitation field and enhanced the flow of bubbles opposite to the direction of SW propagation. Stepping up the PL acted to push the broad cloud progressively pre-focally (toward the SW source), shifting the position of the plane at which the opposing directional bubble flows collided.",
author = "Yuri Pishchalnikov and James McAteer",
year = "2013",
doi = "10.1121/1.4800374",
language = "English",
volume = "19",
booktitle = "Proceedings of Meetings on Acoustics",

}

TY - GEN

T1 - Cavitation-induced streaming in shock wave lithotripsy

AU - Pishchalnikov, Yuri

AU - McAteer, James

PY - 2013

Y1 - 2013

N2 - Cavitation generated by lithotripter shock waves (SWs) in non-degassed water was studied using a 60 frames-per-second camcorder-recording the migration of microbubbles over successive SWs. Lithotripter SWs were produced using a Dornier DoLi-50 electromagnetic lithotripter at 0.5 and 2Hz pulse repetition frequency (PRF). Cavitation was affected by PRF and by the power level (PL) of the lithotripter. At slow PRF, such as shots fired many seconds apart, cavitation was relatively sparse and bubble clouds flowed in the direction of SW propagation. When PRF was increased, the bubble clouds generated by one SW were amplified by subsequent SWs. Cloud amplification was accompanied by an apparent change in the pattern of bubble migration. Whereas bubbles continued to enter the field of view from the prefocal side, the main bubble cloud remained near the focal point. This was due to a streaming of bubbles opposite to the direction of SW propagation. Increasing the PL grew the cavitation field and enhanced the flow of bubbles opposite to the direction of SW propagation. Stepping up the PL acted to push the broad cloud progressively pre-focally (toward the SW source), shifting the position of the plane at which the opposing directional bubble flows collided.

AB - Cavitation generated by lithotripter shock waves (SWs) in non-degassed water was studied using a 60 frames-per-second camcorder-recording the migration of microbubbles over successive SWs. Lithotripter SWs were produced using a Dornier DoLi-50 electromagnetic lithotripter at 0.5 and 2Hz pulse repetition frequency (PRF). Cavitation was affected by PRF and by the power level (PL) of the lithotripter. At slow PRF, such as shots fired many seconds apart, cavitation was relatively sparse and bubble clouds flowed in the direction of SW propagation. When PRF was increased, the bubble clouds generated by one SW were amplified by subsequent SWs. Cloud amplification was accompanied by an apparent change in the pattern of bubble migration. Whereas bubbles continued to enter the field of view from the prefocal side, the main bubble cloud remained near the focal point. This was due to a streaming of bubbles opposite to the direction of SW propagation. Increasing the PL grew the cavitation field and enhanced the flow of bubbles opposite to the direction of SW propagation. Stepping up the PL acted to push the broad cloud progressively pre-focally (toward the SW source), shifting the position of the plane at which the opposing directional bubble flows collided.

UR - http://www.scopus.com/inward/record.url?scp=84878957559&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84878957559&partnerID=8YFLogxK

U2 - 10.1121/1.4800374

DO - 10.1121/1.4800374

M3 - Conference contribution

VL - 19

BT - Proceedings of Meetings on Acoustics

ER -