A method for digital signal processing based laser-Doppler flowmetry

Article type: Research Article

Authors: Greitans, M.^{a; *} | Mikelsons, A.^a | Möller, K.O.^b

Affiliations: [a] Institute of Electronics and Computer Science, Riga, Latvia | [b] Ruhr-University Bochum, Biomedical Research, Lübeck, Germany

Correspondence: [*] Contact address: Modris Greitans, Institute of Electronics and Computer Science, 14 Dzerbenes st, LV-1006 Riga, Latvia. Tel.: 003717 554 500; Fax: 003717 555 337; E-mail: modris@ed.lv.

Abstract: Non-invasive measuring of blood perfusion of tissue is important for establishing the influence of vascular diseases on microcirculation. A signal processing method for laser-Doppler flowmetry is presented in this article. The method is based on the digital filtering. A couple of filters are suggested. One of them is a digital passband filter, second – a digital filter transforming spectrum P(f) of the input signal to fP(f) spectrum. Performance of the suggested method is investigated in comparison with behaviour of the PERIMED instrument as well as with applications based on DFT.

Keywords: Blood perfusion, microcirculation, laser-Doppler flowmetry, spectral estimation, digital signal filtering

DOI: 10.3233/THC-1999-72-304

Journal: Technology and Health Care, vol. 7, no. 2-3, pp. 125-135, 1999