著者

田頭 瑞萌 中川 隆文

出版者

公益社団法人 日本生体医工学会

雑誌

生体医工学 (ISSN:1347443X)

巻号頁・発行日

vol.59, no.1, pp.31-39, 2021-03-10 (Released:2021-04-03)

参考文献数

50

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In this paper, we present a method for facilitating the diagnosis of vascular stenosis in hemodialysis treatments. Sensory evaluation based on vascular sounds is usually used to identify vascular stenosis. However, skilled clinical judgement is required for this work. We applied the Mahalanobis-Taguchi Method to the assessment of vascular abnormalities. Mel-frequency cepstral coefficients, histogram kurtosis, and autocorrelation coefficients are used as features. The difference between normal and abnormal sounds is measured by Mahalanobis distance (MD). The performance of this method is estimated for 60 vascular sounds, with correct results obtained at a rate of 87%for abnormal sounds. The proposed method provides better discrimination than sensory evaluation. In addition, the relative change in MD values along the auscultation positions is similar to the result achieved by sensory evaluation.