Abstract
The increasing use of extracorporeal shock wave lithotripsy (ESWL) in the treatment of kidney and gall bladder stones has intensified interest in studying the properties of the pressure waveforms used for the treatment. It is expected that the acoustic shock wave parameters, such as risetime, peak positive and peak negative pressure amplitudes, and frequency content can all influence the treatment's efficiency. The authors evaluate three prototype piezoelectric sensors for their applicability to quantitative shock-wave measurements. The results of the evaluation indicate that PVDF (polyvinylidene fluoride) polymer transducers with a low acoustic backing have the greatest potential as shock wave-sensors. >
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