小波变换方法检测胃动力

Wavelet transform in detection of gastric motility

目的 研究胃动力检测的小波变换新方法 .方法 用小波变换的方法对实测的胃运动信号根据需要进行低通或带通滤波 .结果 比较精确地计算出进食后胃的半排空时间 ,检测出空腹胃运动信号的三相特征 ,从而可以判别被测对象是否为胃病患者 .结论 在应用小波变换处理胃电信号过程中 。

AIM To study the new wavelet transform for the detect ion of gastric motility. METHODS A gastric signal was low-pass or band-pass filtered with wavelet transform. RESULTS Gastric half emptying time was computed accurately and the three-phase characteristic of the gastric signal was detected. Therefore it could be distinguished whether an examinate suffered from a gastric disease. CONCLUSION Wavelet transform is an effe ctive method by which high frequency noise and baseline drift in gastric signal can successfully be elimina ted by selecting proper transform scales of wavelet transform.