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Experimental set-up for optical measurements: 1) Diffuse Reflectance Spectroscopy before laser ablation, 2) Tissue ablation with an Er:YAG laser (spot size ø 4 mm), 3) Diffuse Reflectance Spectroscopy in the area of ablation (a. Spectrometer, b. Pulsed xenon lamp, c. Reflection/backscattering probe, d. Tissue sample (pig, ex vivo), e. Er:YAG laser).
