| Summary: | 碩士 === 國立成功大學 === 醫學工程研究所碩博士班 === 90 === ABSTRACT
Bioelectrical impedance analysis (BIA) is often widely used for the estimation of fat free mass (FFM) and fat mass (FM) when studying body composition. Body fat is an important parameter in human body, it can help us understand human health and diseases. The purposes of this study are to develop the segmental body composition measurement system and establish Chinese bioimpedance database. The measurement system contains impedance measurement, length and circumference measurement of the arms, human body weight measurement and the measurement of thermal variation between the skin and the electrode. These measured data is transmitted via RS232 and displayed to PC by LabVIEW. These data is saved the text file format to hard disk and established bioimpedance database at the same time. This bioimpedance database is applied to linear regression and fuzzy analysis by the software of Excel, SPSS and FuzzyTECH. Finally, we can find the estimation formulas for body composition related to bioimpedance and anthropometry. In addition, the average errors of linear regression analysis and fuzzy regression analysis are compared to DEXA and analzed. Linear regressin analysis is 3.98 and fuzzy regression analysis is 1.83. The temperature measurement after two minutes ascend 0.03℃~0.06℃ under room temperature(23℃~27.7℃) and skin temperature(28.4℃~32.7℃). The variations of thermal and segmental impedance are very small in measurement.
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