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A novel approach based on OCT for tongue inspection in traditional Chinese medicine

The aim of this report is to establish a tongue inspection method based on OCT imaging for quantifying the tongue properties in traditional Chinese medical diagnosis. The measurement was performed in the model of rats suffering with Spleen-Stomach Dampness-Heat Syndrome using OCT equipment, OCT image and histology estimates of the glossal layer of microstructure were obtained, and the accurate thickness and moisture degree of the tongue coating were analyzed. These OCT image showed that tongue every layer matched the histology estimates of the glossal microstructure, and compared with normal control group the thickness of tongue coating increased in rats suffering with Spleen-Stomach Dampness-Heat Syndrome than normal control rats (P<0.01), yet the moisture degree of tongue body of model group decreased (P<0.01). Therefore, OCT image technique may be benefit and helpful as a tool to provide an objective diagnostic standard for study on tongue inspection in the clinical practice and research of TCM.