A Parkinson's disease measurement system using laser lines and a CMOS image sensor

Rong Seng Chang*, Jen Hwey Chiu, Fang Pey Chen, Jyh Cheng Chen, Jen Lin Yang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

18 Scopus citations


This paper presents a non-invasive, non-contact system for the measurement of the arterial dorsum manus vibration waveforms of Parkinson disease patients. The laser line method is applied to detect the dorsum manus vibration in rest and postural situations. The proposed measurement system mainly consists of a laser diode and a low cost complementary metal-oxide semiconductor (CMOS) image sensor. Laser line and centroid methods are combined with the Fast Fourier Transform (FFT) in this study. The shape and frequency and relative frequency of the dorsum manus vibration waveforms can be detected rapidly using our Parkinson's disease measurement system. A laser line near the wrist joint is used as the testing line. The experimental results show an obvious increase in the amplitude and frequency of dorsum manus variation in the measured region in patients suffering from Parkinson's disease, indicating the obvious effects of the disease. Both in postural and rest state measurements, as the patient disease age increases the vibration frequency increases. The measurement system is well suited for evaluating and pre-diagnosing early stage Parkinson's disease.

Original languageEnglish
Pages (from-to)1461-1475
Number of pages15
Issue number2
StatePublished - Feb 2011


  • CMOS image sensor
  • Centroid method
  • Fast Fourier Transform (FFT)
  • Laser triangulation measurement
  • Parkinson's disease


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