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Quantification of elastin-fiber reticulation in rat mesenteric arterioles using molecular dynamics optimization

For the reconstruction of complex fiber reticulations in confocal microscopy (CM) images, this work studies the molecular dynamics (MD) modeling in order to optimize the sub-voxel structure that can be misjudged as indistinguishable unreal segments versus real ones, thus enabling more accurate quantification of fiber architectures. Numerical results show that MD treatment significantly suppresses unreal fragments (39.06% of short fiber segments), which contribute an extra 18.79% in fiber length in our case. Together with three-dimensional skeletonizing processes, we mainly analyze the extracellular elastin fiber in rat mesenteric arterioles, and show categories of elastin-fiber orientations along the depth of vessel walls, inferring their mechanical anisotropy and diverse functionalities at the tissue level.