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Tri-modality cavitation mapping in shock wave lithotripsy.

Mucong Li1, Georgy Sankin2, Tri Vu1

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This study validates a sliding-window passive cavitation mapping (SW-PCM) method for imaging kidney stone treatment. The validated SW-PCM method accurately maps cavitation, crucial for improving shock wave lithotripsy effectiveness and safety.

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Area of Science:

  • Biomedical Engineering
  • Acoustics
  • Medical Imaging

Background:

  • Shock wave lithotripsy (SWL) is a key treatment for kidney stones.
  • Cavitation during SWL aids stone fragmentation but can cause tissue damage.
  • Accurate spatiotemporal mapping of cavitation is vital for optimizing SWL.

Purpose of the Study:

  • To validate and optimize the sliding-window passive cavitation mapping (SW-PCM) method.
  • To develop a tri-modality system for comprehensive cavitation imaging.
  • To assess the reliability and accuracy of SW-PCM for SWL applications.

Main Methods:

  • Developed a tri-modality cavitation imaging system integrating 3D high-speed optical imaging, active cavitation mapping (ACM), and passive cavitation mapping (PCM).
  • Utilized the system to image laser-induced cavitation bubbles and shock wave-induced cavitation clusters.
  • Analyzed cavitation dynamics using the validated SW-PCM method.

Main Results:

  • The tri-modality system successfully imaged cavitation dynamics in various conditions.
  • Results demonstrated the high reliability and spatiotemporal accuracy of the SW-PCM method.
  • SW-PCM effectively identified individual bubble collapses with high resolution.

Conclusions:

  • The validated SW-PCM approach provides accurate spatiotemporal cavitation mapping.
  • This method can help optimize SWL by maximizing stone fragmentation and minimizing renal injury.
  • The findings support future in vivo applications of SW-PCM in SWL for large animals and humans.