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Variable Sound -Fields of Electro-Hydraulic Extracorporeal Shockwave Applicators

Variable Sound -Fields of Electro-Hydraulic Extracorporeal Shockwave Applicators




Electro-Hydraulic Extracorporeal Shockwave generation results a shot-varying non-linear sound-fields which are not yet properly characterized.

Material and Method:
We have utilized a non-linear wave-propagation simulation in conjunction with experimental spark-gap measurements to predict statistical variations of generated sound-fields. These results are in turn validated with experimental point-wise field measurements in reference water baths as well as in-situ applications.

Experimental verification of simulation results for reproducible fields (i.e. Electro-magnetic and piezo) show good agreement and a significant advantage of non-linear simulation techniques over linear approximations for higher pressure waves. Electro-Hydraulic shock generation based on is shown to result in a probabilistic field distribution based on experimental spark-location distributions.

We provide clear evidence based on theoretical models alongside supporting experimental of the nonstationary nature of Electro-Hydraulic generated sound-fields. The indeterminate location of spark-gap induced collapsing plasma bubble results in a inter-shot variable field which applies varying energies and peak pressures throughout the treatment area. In combination with anatomic models the resulting insilico treatment options can be numerically modeled and differences in applicator technologies estimated.

We introduce a novel approach to characterize the sound-fields Electro-Hydraulic applicators. This approach is applied in estimating and comparing of treatment modalities.


ISMST Congress 2019 Beijing, China
Abstract No. K2
Cyrill Slezak, PhD, Department of Physics Utah Valley University Orem, USA

Dr. Slezak et al., Department of Physics Utah Valley University Orem, USA21th ISMST Congress in Beijing, China Abstract P

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