A comparative study for the assessment on blood flow measurement using self-mixing laser speckle interferometer

Şahin Kaya Ozdemir, Isao Ohno, Shigenobu Shinohara

Research output: Contribution to journalArticle

29 Scopus citations

Abstract

We study a self-mixing laser diode (SM-LD) as a low-cost compact optical sensor for noninvasive blood flow measurement over the surface of the skin. We compare the SM-LD system with a commercially available Doppler flowmeter to assess the accuracy and feasibility of the SM-LD sensors for such applications. For the SM-LD flowmeter, we apply two different signal processing methods: 1) the counting method, i.e., counting the intensity fluctuations of the signal to obtain a frequency value, and 2) the autocorrelation method, i.e., measuring the autocorrelation time of the signal. In vitro measurements show good agreement with the commercially available flowmeter. In vivo measurements performed on test subjects revealed that the autocorrelation technique shows much better results. The results of in vitro and in vivo studies and the comparison with the commercial flowmeter confirm the applicability of the SM-LD flowmeter.

Original languageEnglish (US)
Pages (from-to)355-363
Number of pages9
JournalIEEE Transactions on Instrumentation and Measurement
Volume57
Issue number2
DOIs
StatePublished - Feb 2008

All Science Journal Classification (ASJC) codes

  • Instrumentation
  • Electrical and Electronic Engineering

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