巴金森氏症雷射線三角量測系統; Testing Parkinson's disease by Using Laser Line Triangulation Measurement System

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题名:	巴金森氏症雷射線三角量測系統;Testing Parkinson's disease by Using Laser Line Triangulation Measurement System
作者:	林昭穎;Jhao-Ying Lin
贡献者:	光電科學研究所
关键词:	質心法;CMOS 影像感測器;快速傅立葉轉換;巴金森氏症;雷射三角量測法;Laser line triangulation measurement method;Dorsum manus;Tremor;Parkinson's disease (PD);Centroid method;CMOS image sensor;Fast Fourier Transform (FFT)
日期:	2010-08-01
上传时间:	2010-12-08 14:22:34 (UTC+8)
出版者:	國立中央大學
摘要:	本文提出了一種非侵入性，非接觸式檢測巴金森氏症患者手背振動波形系統，主要運用雷射光線性陣列法檢測皮膚表面的振動。所提出的巴金森氏症測量系統主要由雷射光二極體線性陣列和一個低成本互補金屬氧化物半導體（CMOS）影像感測器所構成。本研究是利用雷射光線性陣列和質心法透過快速傅立葉變換（FFT）。藉由使用我們所提出的巴金森病的量測系統就能快速檢測出手背振動波形的形狀和頻率。巴金森氏症手背附近波形線性之相對變化是被當測詴點。我們廣泛的進行了一系列實驗，評估所設計的巴金森氏症檢測系統的性能。實驗設計分成兩大群組為控制組的正常人和巴金森氏患者並皆更六位，從實驗結果顯示，巴金森氏症患者手背(dorsum manus)在靜止時，更2位病人的左手更靜止性顫抖頻率為4.1到4.3赫茲之間，帄均4.2赫茲。另外4位右手更靜止性顫抖頻率為4.3到4.7赫茲之間，帄均4.5赫茲。六位病人手部在姿勢活動性時，顫抖頻率為0.29到1.52赫茲之間，帄均0.905赫茲。控制組正常人的手靜止性顫抖頻率為0.09到0.53赫茲之間，帄均0.31赫茲。而手姿勢活動性顫抖頻率為0.71到0.82赫茲之間，帄均0.77赫茲。根據六位病人手背在靜止量測呈現的振動的頻率依續為4.5赫茲(病程5年)、4.3赫茲(病程2年)、4.1赫茲(病程3年)、4.7赫茲(病程7年)、4.5赫茲(病程2年)和4.3赫茲(病程7年)，如果排除第六位病人樣本，手背抖動頻率跟病程長短成正比，病程越長手背抖動頻率越高。另一方面控制組正常人手在靜止性和姿勢活動性顫抖頻率之帄均差異為0.46赫茲，然而巴金森氏症患手背靜止性和姿勢活動性顫抖頻率之帄均差異(△f = f resting - f postural action) 為3.495赫茲，控制組正常人在兩情況下差異量不大，而巴金森氏症患者在兩情況下差異量很大，初步數據跟控制組正常人互相比較，已經見其差異性(八倍)，此法也可以藉機消除受測者心理因素和環境因素的干擾。而本文所提出的檢測系統精密度高(解析度10μm)能測量出手背微振動。本研究所提出巴金森氏症檢測系統，採用的CMOS 影像感測器設計是屬於非接觸式，便於攜帶，易於使用，成本低，是可行的系統。此外，所設計的巴金森氏症檢測系統在中醫臨床實踐非常適合用於評估和預先診斷一個人的健康。 This paper presents a non-invasive, non-contact system to measure Parkinson's disease patient dorsum manus vibration waveforms of artery via applying laser line method to detect dorsum manus vibration. The proposed Parkinson's disease measurement system chiefly consists of a laser diode and a low cost complementary metal-oxide semiconductor (CMOS) image sensor. Laser line and centroid method are combined with the Fast Fourier Transform (FFT) in this study. The shape and frequency of the dorsum manus vibration waveforms can be detected rapidly by using our Parkinson's disease measurement system. The relative variation of the Parkinson's disease patient dorsum manus vibration waveforms at laser line near wrist joint is used as testing points. An extensive series of experiments was conducted to evaluate the performance of the designed Parkinson's disease measurement system. Experimental design is divided into two groups for that control group normal human and Parkinson's patients. From the experimental results show that Parkinson's disease patients dorsum manus at rest, two patients left dorsum manus existence 4.1-4.3 Hertz of resting tremor frequency and the average frequency is 4.2 hertz. In addition the four patients with right dorsum manus 4.3-4.7 hertz of resting tremor frequency and the average frequency is 4.5 Hertz. Six patients dorsum manus postural action tremor frequency range from 0.29 to 1.52 hertz, and the average frequency is 0.905 Hertz. The control group normal human dorsum manus resting tremor frequency range from 0.09 to 0.53 hertz and the average frequency is 0.31 hertz, and postural action tremor frequency range from 0.71 to 0.82 hertz and the average frequency is 0.77 hertz. According to the results, six patients dorsum manus resting tremor frequency in descending order, 4.5 Hz (course of 5 years), 4.3 Hz (duration 2 years of disease), 4.1 Hz (duration 3 years of disease), 4.7 Hz (duration 7 years of disease), 4.5 Hz (duration 2 years of disease) and 4.3 Hz (duration 7 years of disease). If we rule out the sixth patient samples, dorsum manus tremor frequency is proportional to the duration of disease. On the other hand, we are laser line can detect two different situations simultaneously, for example the frequencies of postural action tremor left hand and the resting right hand by one laser line across both hand and get two frequencies dorsum manus simultaneously. By calculated their difference △f = f resting - f postural action. We get the preliminary data. △f = 3.495 Hertz which is almost ten times than the control group (△f = 0.46). This method can get rid of the environment and the psychological influence to the hand’s vibration. In our method, we can measure the micro vibration of human hand as high as 10μm resolution. This research demonstrates that applying a CMOS image sensor in designing a non-contact, portable, easy-to-use, low cost Parkinson's disease measurement system is feasible. Also, the designed Parkinson's disease measurement system is well suited for evaluating and pre-diagnosing the health of a human being.
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