publication . Conference object . 1993

Secondary sound classification for the assessment of focus positioning in shock-wave lithotripsy

Grennberg, Anders; Almquist, Lars-Olof; Holmner, Nils-Gunnar; Olsson, Lennart;
Open Access English
  • Published: 01 Jan 1993
  • Publisher: Medicinsk Teknik
  • Country: Sweden
Abstract
A problem encountered when using acoustic shock-waves for kidney stone disintegration is that the positioning of the focus relative to a stone, for the best possible fragmenting effect, is crtitical. The standard methods for focus positioning are ultrasound or x-ray imaging. These methods are, however, not always sufficient and a better indication of a well positioned focus would be valuable. The secondary sound emitted as a result of each shock-wave has been found to contain valuable information. A skilled operator is able to hear from the timbre of these sound pulses when the positioning of the focus is adequate. A method for the automatic evaluation of second...
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