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In vivo hyperspectral reflectance imaging of a tumor without GFP. (a) Reflectance images at different wavelength bands. (b) An RGB composite image generated from the tumor hypercube. (c) Red solid line: the average reflectance spectra of the vessels inside tumor region; blue dotted line: the average reflectance spectra of randomly selected nonvessel tumor regions; green dash-dot line: the average of randomly selected normal regions around the tumor.
