Int J Comput Assist Radiol Surg - Principal component vector rotation of the tongue color spectrum to predict Mibyou (disease-oriented state).

Tópicos

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Resumo

RPOSE: Kampo medicine (Japanese traditional herbal medicine) contains concepts useful for preventive medicine. For example, "Mibyou" (disease-oriented state) aims to prevent illness by early recognition. Kampo diagnosis is based on subjective examinations, such as tongue inspection, by trained specialist physicians. An objective metric of the tongue color spectrum was developed as a surrogate for subjective visual inspection.METHODS: Tongue images were acquired with a hyperspectral imaging system, and the uncoated tongue region was segmented automatically. The spectral information of the uncoated tongue area was analyzed by principal component analysis (PCA). The component vector most representative of each clinical symptom was found by rotating the vector on a plane spanned by two arbitrary principal component vectors.RESULTS: The system was tested in human volunteers. Forty-four hyperspectral images were acquired from 30 healthy male subjects for initial testing. The Oketsu (blood stagnation) score was determined by an experienced clinician in Kampo medicine from 27 of 30 subjects. The correlation between respective principal components and Oketsu score was 0.67?at maximum, and increased to 0.73 by linear combination, while it was -0.75 by vector rotation. Significant correlations for many disorders were demonstrated, and vector rotation showed better correlation than linear combination.CONCLUSIONS: A PCA-based algorithm was developed to objectively evaluate patients using color images of the tongue surface. Testing showed that this method was a feasible surrogate for expert visual tongue analysis. This tool should help non-trained people identify "Mibyou" health status for individuals. The algorithm is free of empirical criteria, and it may be it applicable to many hyperspectral image types.

Resumo Limpo

rpose kampo medicin japanes tradit herbal medicin contain concept use prevent medicin exampl mibyou diseaseori state aim prevent ill earli recognit kampo diagnosi base subject examin tongu inspect train specialist physician object metric tongu color spectrum develop surrog subject visual inspectionmethod tongu imag acquir hyperspectr imag system uncoat tongu region segment automat spectral inform uncoat tongu area analyz princip compon analysi pca compon vector repres clinic symptom found rotat vector plane span two arbitrari princip compon vectorsresult system test human volunt fortyfour hyperspectr imag acquir healthi male subject initi test oketsu blood stagnat score determin experienc clinician kampo medicin subject correl respect princip compon oketsu score maximum increas linear combin vector rotat signific correl mani disord demonstr vector rotat show better correl linear combinationconclus pcabas algorithm develop object evalu patient use color imag tongu surfac test show method feasibl surrog expert visual tongu analysi tool help nontrain peopl identifi mibyou health status individu algorithm free empir criteria may applic mani hyperspectr imag type

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