Title :
Shock wave shape optimisation in ESWL and PSWL
Author_Institution :
High Speed Phys. Lab., Univ. des Saarland, Saarbruecken, West Germany
Abstract :
Underwater pressure pulses of different shock-wave generators used for extracorporal kidney stone destruction (shock wave lithotripsy) are investigated in the time and frequency domain. Traumatic low-frequency components can be eliminated by high-pass filtering with dispersive wave guides. If piezoelectric film stripes are arranged in a water bath one after the other with constant distances between them, shock wave pulses with arbitrary shape can be generated and amplified by a factor depending on the number of stripes. The amplified shock wave pulse will be focused by an acoustic lens.<>
Keywords :
biomedical ultrasonics; kidney; radiation therapy; shock wave effects; ESWL; PSWL; acoustic lens; dispersive wave guides; extracorporal kidney stone destruction; frequency domain; high-pass filtering; piezoelectric film stripes; shock wave lithotripsy; shock wave pulses; shock wave shape optimisation; shock-wave generators; time domain; traumatic low frequency components; underwater pressure pulses; water bath;
Conference_Titel :
Engineering in Medicine and Biology Society, 1988. Proceedings of the Annual International Conference of the IEEE
Conference_Location :
New Orleans, LA, USA
Print_ISBN :
0-7803-0785-2
DOI :
10.1109/IEMBS.1988.94775
