How to asses, visualize and compare the anisotropy of linear structures reconstructed from optical sections ? A study based on histopathological quantification of human brain microvessels

0365082 - FGÚ 2012 RIV GB eng J - Journal Article
Kochová, P. - Cimrman, R. - Janáček, Jiří - Witter, K. - Tonar, Z.
How to asses, visualize and compare the anisotropy of linear structures reconstructed from optical sections ? A study based on histopathological quantification of human brain microvessels.
Journal of Theoretical Biology. Roč. 286, - (2011), s. 67-78. ISSN 0022-5193. E-ISSN 1095-8541
Grant - others:GA ČR(CZ) GA106/09/0740; GA ČR(CZ) GP106/09/P226
Institutional research plan: CEZ:AV0Z50110509
Keywords : rose of directions * preferential directions * chi-square test * length density * python
Subject RIV: EA - Cell Biology
Impact factor: 2.208, year: 2011

In our study, we present a novel p(chi2) (chi-square) method for evaluating the anisotropy of line systems that involves comparing the observed length densities of lines with the discrete uniform distribution of an isotropic line system with the chi2-test. Using this method in our open source software, we determined the rose of directions, preferential directions and level of anisotropy of linear systems representing the microscopic blood vessels in samples of various regions from human brains (cortex, subcortical gray matter and white matter). The novel method was compared with two other methods used for anisotropy quantification (ellipsoidal and fractional anisotropy). All three methods detected different levels of anisotropy of blood microvessels in human brain. The microvascular bed in the cortex was closer to an isotropic network, while the microvessels supplying the white matter appeared to be an anisotropic and direction-sensitive system
Permanent Link: http://hdl.handle.net/11104/0200416