10 January 1996 Investigations of pulsed laser tissue ablation by short-time exposure video recording and image processing
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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.
© (1996) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Bernd Treffler, Bernd Treffler, Thomas H. Meier, Thomas H. Meier, Marc Sauter, Marc Sauter, Lothar W. Weber, 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); doi: 10.1117/12.229559; https://doi.org/10.1117/12.229559

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