Influence of cerebrospinal fluid on specific absorption rate generated by 300 MHz MRI transmit array

M. Kozlov, P. L. Bazin, H. E. Moller, N. Weiskopf

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We investigated how cerebrospinal fluid (CSF) simulated as a single electrically connected object and variation of the geometry of an anatomical human head model influence the transmit and safety excitation efficiencies of a 7T magnetic resonance imaging transmit array. A dual-row array was excited in circularly polarized (CP) and radiofrequency (RF) shimming modes. In both excitation modes, CSF partially shielded the brain from the array RF field. It resulted in decreases of both transmit and safety excitation efficiencies. A smaller head size resulted in larger transmit and safety excitation efficiencies for the CP excitation mode.

Original languageEnglish (US)
Title of host publication2016 10th European Conference on Antennas and Propagation, EuCAP 2016
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9788890701863
DOIs
StatePublished - May 31 2016
Externally publishedYes
Event10th European Conference on Antennas and Propagation, EuCAP 2016 - Davos, Switzerland
Duration: Apr 10 2016Apr 15 2016

Other

Other10th European Conference on Antennas and Propagation, EuCAP 2016
CountrySwitzerland
CityDavos
Period4/10/164/15/16

Keywords

  • Antenna arrays
  • biomedical imaging
  • computational electromagnetics

ASJC Scopus subject areas

  • Radiation
  • Computer Networks and Communications
  • Instrumentation

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