Effect of beam size on stone comminution in shock wave lithotripsy

The effect of beam size on stone comminution in the Dornier HM-3 lithotripter were investigated using a modified reflector (MR), which was developed to produce an acoustic field with higher peak pressure and smaller beam size compared to the original reflector (OR) of the HM-3. The acoustic fields produced at 20 kV by the MR in the focal plane, and by the OR in the focal and pre-focal plane (z = -15 mm) were characterized using a light spot hydrophone. The efficiencies of stone comminution in a mesh holder were similar, but the corresponding values produced by using the MR in a membrane holder were significantly lower than those produced by the OR in the focal and pre-focal planes. These results suggest that a broad beam size could increase stone comminution efficiency when fragments are spreading out or moving due to respiratory motion in a large area during SWL. In contrast, when stone fragments are confined and well aligned to lithotripter focus the beam size may not influence significantly the treatment outcome. © 2009 American Institute of physics.

Full Text

Duke Authors

Cited Authors

  • Qin, J; Simmons, WN; Sankin, G; Zhong, P

Published Date

  • 2009

Published In

Volume / Issue

  • 1113 /

Start / End Page

  • 337 - 341

International Standard Serial Number (ISSN)

  • 0094-243X

Digital Object Identifier (DOI)

  • 10.1063/1.3131443

Citation Source

  • SciVal