Conductivity imaging of human lower extremity using MREIT with multi-echo pulse sequence and 3 mA imaging current

Young Tae Kim*, Atul S. Minhas, Zijun Meng, Hyung Joong Kim, Eung Je Woo

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contributionpeer-review

5 Citations (Scopus)

Abstract

We present our recent developments in tissue conductivity imaging of the human lower extremity using MREIT. In performing in vivo human knee and calf imaging experiments, we addressed two technical issues of the chemical shift artifact and measurement noise. Adopting a recently developed chemical shift artifact correction method for MREIT, we could improve the quality of conductivity images of the knee and calf. We found that the correction method is advantageous in terms of the signal-to-noise ratio (SNR) compared with a fat suppression method. Since the knee is more sensitive to injection currents, we limited the current amplitude in knee experiments to 3 mA to avoid painful sensation. Reduction of the current amplitude requests a similar reduction of the noise level in measured magnetic flux density signals since the signal is proportional to the current amplitude. We incorporated a lately developed multi-echo based MREIT pulse sequence to enhance MR signals and prolong the total current injection time, thereby reducing the noise level in measured magnetic flux density signals.

Original languageEnglish
Title of host publication2011 8th International Symposium on Noninvasive Functional Source Imaging of the Brain and Heart and the 2011 8th International Conference on Bioelectromagnetism
Pages48-52
Number of pages5
DOIs
Publication statusPublished - 2011
Externally publishedYes
Event2011 8th International Symposium on Noninvasive Functional Source Imaging of the Brain and Heart and the 2011 8th International Conference on Bioelectromagnetism, NFSI and ICBEM 2011 - Banff, AB, Canada
Duration: 13 May 201116 May 2011

Conference

Conference2011 8th International Symposium on Noninvasive Functional Source Imaging of the Brain and Heart and the 2011 8th International Conference on Bioelectromagnetism, NFSI and ICBEM 2011
CountryCanada
CityBanff, AB
Period13/05/1116/05/11

Keywords

  • chemical shift artifact correction
  • conductivity image
  • magnetic flux density
  • MREIT

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