Abstract
The quantitative morphological evaluation at high resolution is of significance for the study of laser-tissue interaction. In this paper, a full-field optical coherence microscopy (OCM) system with high resolution of ∼2 μm was developed to investigate the ablation on urinary calculus by a free-running Er:YAG laser. We studied the morphological variation quantitatively corresponding to change of energy setting of the Er:YAG laser. The experimental results show that the full-field OCM enables quantitative evaluation of the morphological shape of craters and material removal, and particularly the fine structure. We also built a heat conduction model to simulate the process of laser-calculus interaction by using finite element method. Through the simulation, the removal region of the calculus was calculated according to the temperature distribution. As a result, the depth, width, volume, and the cross-sectional profile of the crater in calculus measured by full-field OCM matched well with the theoretical results based on the heat conduction model. Both experimental and theoretical results confirm that the thermal interaction is the dominant effect in the ablation of calculus by Er:YAG laser, demonstrating the effectiveness of full-field OCM in studying laser-tissue interactions.
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Xiao, Q., Lü, T., Li, Z. et al. Quantitative morphological evaluation of laser ablation on calculus using full-field optical coherence microscopy. Laser Phys. 21, 1838–1843 (2011). https://doi.org/10.1134/S1054660X11170257
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DOI: https://doi.org/10.1134/S1054660X11170257