期刊
MEDICAL LASER APPLICATIONS AND LASER-TISSUE INTERACTIONS IX
卷 11079, 期 -, 页码 -出版社
SPIE-INT SOC OPTICAL ENGINEERING
DOI: 10.1117/12.2527040
关键词
Laser Doppler flowmetry; spectrum decomposition; blood flow oscillations; blood perfusion; probe pressure effects
资金
- Russian Science foundation [18-79-00237]
- Academy of Finland [318281]
- Academy of Finland (AKA) [318281, 318281] Funding Source: Academy of Finland (AKA)
- Russian Science Foundation [18-79-00237] Funding Source: Russian Science Foundation
Presently, in the modern laser Doppler flowmetry (LDF) the distribution of blood perfusion and its changes along the Doppler shift frequencies are simply ignored and/or not properly addressed. Utilizing the registered power spectrum of photocurrent, we introduce an LDF signal processing approach suitable for expanding of diagnostic capabilities of the technique. In particular, we demonstrate that it is possible to determine how the oscillations of blood flow (cardiac, breathe, myogenic, etc.) are distributed along the Doppler shift frequency. Wavelet analysis is utilized to extract the oscillations corresponded to the particular frequency sub-bands of blood perfusion. The main purpose of this study is to identify influence of local pressure by fiber optic probe on cardiac oscillations and their distribution along frequency of Doppler shift.
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