Abstract
Vascular networks possess properties of self-similarity, which allows one to consider them as stochastic fractals. The box-counting method based on calculations along the vessel centerlines is traditionally used to evaluate the parameters of the fractal structure. Such an algorithm does not allow one to consider structural differences between different bifurcation levels of the system, characterized by the natural property of changing the blood vessel caliber. In this case, the discrepancy between the values of the fractal dimension may exceed 20%. In this paper, an approach that allows one to avoid underestimating the complexity of the system for low bifurcation orders and large vessels is proposed. Based on the constructed arterial tree of the rat brain, it was shown that the fractal dimension increases with an increase in the values of both bifurcation exponent and length coefficient. The obtained values most fully reflect the properties of the arterial tree considering the real geometry of the vessels; they are proposed for use in estimating three-dimensional vascular networks.
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Kopylova, V.S., Boronovskiy, S.E. & Nartsissov, Y.R. Application of Fractal Analysis to Evaluate the Rat Brain Arterial System. BIOPHYSICS 65, 495–504 (2020). https://doi.org/10.1134/S0006350920030100
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DOI: https://doi.org/10.1134/S0006350920030100