TY - JOUR
T1 - A comparative study for the assessment on blood flow measurement using self-mixing laser speckle interferometer
AU - Ozdemir, Şahin Kaya
AU - Ohno, Isao
AU - Shinohara, Shigenobu
N1 - Funding Information:
Manuscript received July 15, 2006; revised September 12, 2007. This work was supported by the Japan Society for the Promotion of Science under Grant-in-Aid for Scientific Research (C) 12680828 in 2000–2001.
PY - 2008/2
Y1 - 2008/2
N2 - 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.
AB - 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.
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U2 - 10.1109/TIM.2007.909473
DO - 10.1109/TIM.2007.909473
M3 - Article
AN - SCOPUS:39449110072
SN - 0018-9456
VL - 57
SP - 355
EP - 363
JO - IEEE Transactions on Instrumentation and Measurement
JF - IEEE Transactions on Instrumentation and Measurement
IS - 2
ER -