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.
|Proceedings of SPIE - International Society for Optical Engineering
|Published - 22 Jul 2019
|European Conference on Biomedical Optics, ECBO_2019 - Munich, Netherlands
Duration: 23 Jun 2019 → 25 Jun 2019
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- Blood flow oscillations
- Blood perfusion
- Laser Doppler flowmetry
- Probe pressure effects
- Spectrum decomposition