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Titolo:
Noninvasive blood flow measurement using speckle signals from a self-mixing laser diode: in vitro and in vivo experiments
Autore:
Ozdemir, SK; Shinohara, S; Takamiya, S; Yoshida, H;
Indirizzi:
Univ Shizouka, Hamamatsu, Shizuoka 4328561, Japan Univ Shizouka HamamatsuShizuoka Japan 4328561 u, Shizuoka 4328561, Japan
Titolo Testata:
OPTICAL ENGINEERING
fascicolo: 9, volume: 39, anno: 2000,
pagine: 2574 - 2580
SICI:
0091-3286(200009)39:9<2574:NBFMUS>2.0.ZU;2-B
Fonte:
ISI
Lingua:
ENG
Soggetto:
SEMICONDUCTOR-LASER; DOPPLER VELOCIMETRY; VELOCITY; INTERFERENCE; DYNAMICS;
Keywords:
blood flow; self-mixing effect; speckle; speckle velocimetry; external cavity laser; optical feedback; autocorrelation;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
--discip_EC--
Citazioni:
20
Recensione:
Indirizzi per estratti:
Indirizzo: Ozdemir, SK Univ Shizouka, Johoku 3-5-1, Hamamatsu, Shizuoka 4328561, Japan Univ Shizouka Johoku 3-5-1 Hamamatsu Shizuoka Japan 4328561 an
Citazione:
S.K. Ozdemir et al., "Noninvasive blood flow measurement using speckle signals from a self-mixing laser diode: in vitro and in vivo experiments", OPT ENG, 39(9), 2000, pp. 2574-2580

Abstract

A semiconductor laser speckle velocimeter that uses the self-mixing effectis studied for noninvasive relative blood flow measurements. The random modulation of intensity and spectra of the laser diode caused by the backcoupling of the scattered light from the red blood cells into the laser cavity is detected as a speckle signal with a photodiode inside the laser package. The autocorrelation of this self-mixing speckle signal gives information on the flow velocity of the blood. The proposed method is elucidated with invitro and in vivo experiments. The results of these measurements are giventogether with a discussion of dependence of speckle signal of a self-mixing laser diode (SMLD) on various parameters such as velocity, hematocrit level of blood, and background reflectance of blood suspension, (C) 2000 Society of Photo-Optical Instrumentation Engineers. [S0091-3286(00)01009-6].

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Documento generato il 02/07/20 alle ore 18:51:00