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Multispectral identification of plastics: "Multi-sensor characterization for an improved identification of polymers in WEEE recycling" (2024) https://www.sciencedirect.com/science/article/pii/S0956053X2...

Could something like this be used to see inside human bodies? The body might be considered "scattering media". Knowing the general construction of bodies might help in predicting the kinds of scattering that occur.