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Electrical conductivity imaging by magnetic resonance electrical impedance tomography (MREIT)
Author(s) -
Oh Suk H.,
Han Jae Y.,
Lee Soo Y.,
Cho Min H.,
Lee Byung I.,
Woo Eung J.
Publication year - 2003
Publication title -
magnetic resonance in medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.696
H-Index - 225
eISSN - 1522-2594
pISSN - 0740-3194
DOI - 10.1002/mrm.10588
Subject(s) - imaging phantom , electrical impedance tomography , electrical resistivity and conductivity , current density , magnetic field , conductivity , tomography , nuclear magnetic resonance , electrical impedance , magnetic resonance imaging , materials science , current (fluid) , biomagnetism , electrical resistivity tomography , electric current , physics , optics , radiology , medicine , quantum mechanics , thermodynamics
Magnetic resonance electrical impedance tomography (MREIT) is a recently developed imaging technique that combines MRI and electrical impedance tomography (EIT). In MREIT, cross‐sectional electrical conductivity images are reconstructed from the internal magnetic field density data produced inside an electrically conducting subject when an electrical current is injected into the subject. In this work the results of an electrical conductivity imaging experiment are presented, along with some practical considerations regarding MREIT. The MREIT experiment was performed with a 0.3 Tesla MRI system on a phantom made of two compartments with different electrical conductivities. The current density inside the phantom was measured by the MR current density imaging (MRCDI) technique. The measured current density was then used for conductivity image reconstruction by the J ‐substitution algorithm. The conductivity phantom images obtained with an injection current of 28mA showed conductivity errors of about 25.5%. Magn Reson Med 50:875–878, 2003. © 2003 Wiley‐Liss, Inc.