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Visualization of lymphatic channels with FITC using the Mitaka microscope. A, With no filter, the lymphatic channel is slightly visible under white light. B, With a low-contrast fluorescence filter, there is visibility of non-fluorescent tissue and some fluorescence within the lymphatic channel. C, With a high-contrast fluorescence filter, there is poor visibility of non-fluorescent tissue, but excellent fluorescence seen within the lymphatic channel.
