A fast time-domain algorithm for the assessment of tissue blood flow in laser-Doppler flowmetry

In this study, we derive a fast, novel time-domain algorithm to compute the nth-order moment of the power spectral density of the photoelectric current as measured in laser-Doppler flowmetry (LDF). It is well established that in the LDF literature these moments are closely related to fundamental physiological parameters, i.e. concentration of moving erythrocytes and blood flow. In particular, we take advantage of the link between moments in the Fourier domain and fractional derivatives in the temporal domain. Using Parseval's theorem, we establish an exact analytical equivalence between the time-domain expression and the conventional frequency-domain counterpart. Moreover, we demonstrate the appropriateness of estimating the zeroth-, first- and second-order moments using Monte Carlo simulations. Finally, we briefly discuss the feasibility of implementing the proposed algorithm in hardware.


Publié dans:
Physics In Medicine And Biology, 55, N383-N394
Année
2010
Publisher:
Institute of Physics
ISSN:
0031-9155
Mots-clefs:
Laboratoires:




 Notice créée le 2011-12-16, modifiée le 2019-12-05


Évaluer ce document:

Rate this document:
1
2
3
 
(Pas encore évalué)