Publication detail

Anisotropic Conductivity of Rat Head Phantom and its Influence on Electroencephalogram Source Localization

LÁČÍK, J. KOUDELKA, V. VEJMOLA, Č. KUŘÁTKO, D. VANĚK, J. WÓJCIK, D. PÁLENÍČEK, T. RAIDA, Z.

Original Title

Anisotropic Conductivity of Rat Head Phantom and its Influence on Electroencephalogram Source Localization

Type

journal article in Web of Science

Language

English

Original Abstract

In this paper we deal with a simplified anisotropic rat head phantom development and the investigation of the influence of the anisotropic white matter on electroencephalogram source localization. The proposed phantom is based on the cubic cross cell composition combined with agar mixture to set desired electrical conductivity anisotropic ratio. For the fabrication of the phantom, the 3D printed technology is exploited. Starting from a real rat brain, we proposed a simplified brain model incorporating the actual dimensions, shape and conductivity parameters of both grey and white matter containing simultaneously relevant deep-brain electrical signal sources. Five testing dipoles were located in the areas corresponding to the active brain regions. A single dipole localization error was calculated by comparing an inverse solution with a dipole position obtained from a computer tomography image. Neglecting anisotropy had a rather weak effect on localization error of a single testing dipole in our model. The reliability map was computed and interpreted in terms of spatial similarity between distributed inverse solutions involving isotropic and anisotropic forward models. We found spatially specific error increases located close to the electrodes and in the vicinity of anisotropic compartment. Hence, areas to be most sensitive to neglecting anisotropy in our model were identified.

Keywords

Anisotropic magnetoresistance; Brain modeling; Conductivity; Location awareness; Phantoms; Rats; White matter

Authors

LÁČÍK, J.; KOUDELKA, V.; VEJMOLA, Č.; KUŘÁTKO, D.; VANĚK, J.; WÓJCIK, D.; PÁLENÍČEK, T.; RAIDA, Z.

Released

20. 1. 2022

Publisher

IEEE

Location

USA

ISBN

2169-3536

Periodical

IEEE Access

Year of study

10

Number

1

State

United States of America

Pages from

9877

Pages to

9888

Pages count

12

URL

https://ieeexplore.ieee.org/document/9684466

Full text in the Digital Library

http://hdl.handle.net/11012/204597

BibTex

@article{BUT177469,
  author="Jaroslav {Láčík} and Vlastimil {Koudelka} and Čestmír {Vejmola} and David {Kuřátko} and Jiří {Vaněk} and Daniel Krzysztof {Wójcik} and Tomáš {Páleníček} and Zbyněk {Raida}",
  title="Anisotropic Conductivity of Rat Head Phantom and its Influence on Electroencephalogram Source Localization",
  journal="IEEE Access",
  year="2022",
  volume="10",
  number="1",
  pages="9877--9888",
  doi="10.1109/ACCESS.2022.3143952",
  issn="2169-3536",
  url="https://ieeexplore.ieee.org/document/9684466"
}