A controllably anisotropic conductivity or diffusion phantom constructed from isotropic layers

Rosalind J. Sadleir, Farida Neralwala, Tang Te, Aaron Tucker

Research output: Contribution to journalArticle

14 Scopus citations

Abstract

Phantoms with controllable and well-defined anisotropy are needed to test methods for imaging electrical anisotropy. We developed and tested a phantom that had properties similar to a homogeneous anisotropic conductive medium. The phantom was constructed with alternate slices of isotropic gel having different conductivities. The degree of anisotropy in the phantom could be varied easily by changing the relative conductivity of the two gels. We tested the stability of several phantoms and found their properties were maintained for approximately 8 h following construction. The phantom has application to electrical impedance tomography, magnetic resonance electrical impedance tomography, EEG and ECG source imaging and diffusion tensor imaging.

Original languageEnglish (US)
Pages (from-to)2522-2531
Number of pages10
JournalAnnals of Biomedical Engineering
Volume37
Issue number12
DOIs
StatePublished - Dec 1 2009
Externally publishedYes

Keywords

  • Anisotropy
  • DTI
  • EIT
  • Inverse ECG
  • Inverse EEG
  • MREIT
  • Phantom

ASJC Scopus subject areas

  • Biomedical Engineering

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