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We investigate the utility of terahertz (THz) spectroscopy in identifying Alzheimer's disease in human brain tissue. Using reflection-mode time-domain THz spectroscopy, two-dimensional images of formalin-fixed and paraffin-embedded tissue samples of the hippocampus area were recorded in the 60 GHz–2 THz band. The THz images were compared with microscopic images of the same samples after hematoxylin...
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