Determination of Electric Conductivity and Local SAR Via B1 Mapping

  • Katscher U
  • Findeklee C
  • Vernickel P
 et al. 
  • 120


    Mendeley users who have this article in their library.
  • 147


    Citations of this article.


The electric conductivity can potentially be used as an additional diagnostic parameter, e.g., in tumor diagnosis. Moreover, the electric conductivity, in connection with the electric field, can be used to estimate the local SAR distribution during MR measurements. In this study, a new approach, called electric properties tomography (EPT) is presented. It derives the patient's electric conductivity, along with the corresponding electric fields, from the spatial sensitivity distributions of the applied RF coils, which are measured via MRI. Corresponding numerical simulations and initial experiments on a standard clinical MRI system underline the principal feasibility of EPT to determine the electric conductivity and the local SAR. In contrast to previous methods to measure the patient's electric properties, EPT does not apply externally mounted electrodes, currents, or RF probes, thus enhancing the practicality of the approach. Furthermore, in contrast to previous methods, EPT circumvents the solution of an inverse problem, which might lead to significantly higher spatial image resolution.

Author-supplied keywords

  • B1 mapping
  • electric conductivity
  • electric impedance tomography
  • local SAR

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document

Get full text


  • Ulrich Katscher

  • Christian Findeklee

  • Peter Vernickel

  • Kay Nehrke

  • Tobias Voigt

  • Olaf Dössel

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free