A model for frequency dependence of conductivities of the live human skull

Autor:	M, Akhtari, H C, Bryant, D, Emin, W, Merrifield, A N, Mamelak, E R, Flynn, J J, Shih, M, Mandelkern, A, Matlachov, D M, Ranken, E D, Best, M A, DiMauro, R R, Lee, W W, Sutherling
Rok vydání:	2003
Předmět:	Analysis of Variance Skull Electric Conductivity Electric Impedance Humans Magnetoencephalography Computer Simulation Electroencephalography In Vitro Techniques Electrodes Gelatin Sponge Absorbable Models Biological Algorithms
Zdroj:	Brain topography. 16(1)
ISSN:	0896-0267
Popis:	A mathematical model (sigma(omega) approximately equal to A omega alpha, where, sigma is identical with conductivity, omega = 2 pi f is identical with applied frequency (Hz), A (amplitude) and alpha (unit less) is identical with search parameters) was used to fit the frequency dependence of electrical conductivities of compact, spongiosum, and bulk layers of the live and, subsequently, dead human skull samples. The results indicate that the fit of this model to the experimental data is excellent. The ranges of values of A and alpha were, spongiform (12.0-36.5, 0.0083-0.0549), the top compact (5.02-7.76, -0.137-0.0144), the lower compact (2.31-10.6, 0.0267-0.0452), and the bulk (7.46-10.6, 0.0133-0.0239). The respective values A and alpha for the respective layers of the dead skull samples were (40.1-89.7, -0.0017-0.0287), (5.53-14.5, -0.0296 - -0.0061), (4.58-15.9, -0.0226-0.0268), and (12.7-25.3, -0.0158-0.0132).
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=pmid________::923b009bf8ca446fafd9a7303cf2f89e https://pubmed.ncbi.nlm.nih.gov/14587968 Zobrazit plný text záznamu Full text from SpringerLink