Investigations of pulsed laser tissue ablation by short-time exposure video recording and image processing

Bernd Treffler; Thomas H. Meier; Marc Sauter; Lothar W. Weber

doi:10.1117/12.229559

10 January 1996 Investigations of pulsed laser tissue ablation by short-time exposure video recording and image processing

Bernd Treffler, Thomas H. Meier, Marc Sauter, Lothar W. Weber

Author Affiliations +

Proceedings Volume 2624, Laser-Tissue Interaction and Tissue Optics; (1996) https://doi.org/10.1117/12.229559
Event: BiOS Europe '95, 1995, Barcelona, Spain

Abstract

We report on investigations of laser ablation of larger particles which may be in the minority but are known to be the main carrier of possibly infectious materia. We determined the dynamics of the ablated material by means of short-time exposure video recording with a Schlieren-Optik device. In addition, ablated particles were collected on microscopical slides and examined visually. The region of interest was imaged on a CCD-camera and transferred to a image processing system to get information about the size distribution and the morphology of the particulate matter. For the experiments we irradiated both soft and hard tissues and tissue modelling substances with pulsed and, for comparison, with continuous wave lasers. The particle velocities and the morphology of the ablated matter, either of irregular or special form, depend strongly on the laser type and laser parameters, respectively the treated material. In case of spherical aerosols we quantitatively determined the particle size distributions, for irregular shaped particles (mostly fibrous) only qualitative statements can be made.

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Bernd Treffler, Thomas H. Meier, Marc Sauter, and Lothar W. Weber "Investigations of pulsed laser tissue ablation by short-time exposure video recording and image processing", Proc. SPIE 2624, Laser-Tissue Interaction and Tissue Optics, (10 January 1996); https://doi.org/10.1117/12.229559

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