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19 May 2008 Imaging of laser-induced thermo-elastic stress in biotissues with shadowgraph
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This work presents the results of shlieren visualization of thermo-elastic stress, which is induced by laser irradiation in the bulk of tissue or tissue-like gel. This thermo-elastic stress results from water absorption of the pulses of an Er-fiber laser radiation, which produced thermal effect in irradiated zone of tissue. Imaging of laser-irradiated zone of tissue with shadowgraph and digital image processing showed that thermal stress-zone is located in the tissues at the depth of absorption of laser radiation. Digital streak camera allowed us to observe frame-by-frame growth of thermal stress in irradiated tissue. Imaging of tissue with shadowgraph presented data on stress-waves, bubbles formation during a laser pulse repetition and generation of hydrodynamic flow after a laser pulse.
© (2008) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Alexander I. Omelchenko and Emil N. Sobol "Imaging of laser-induced thermo-elastic stress in biotissues with shadowgraph", Proc. SPIE 7000, Optical and Digital Image Processing, 700015 (19 May 2008);

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