Cognitive effects of head-movements in stray fields generated by a 7 Tesla whole-body MRI magnet

F. de Vocht*, T. Stevens, P. Glover, A. Sunderland, P. Gowland, H. Kromhout

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

51 Citations (Scopus)


The study investigates the impact of exposure to the stray magnetic field of a whole-body 7 T MRI scanner on neurobehavioral performance and cognition. Twenty seven volunteers completed four sessions, which exposed them to similar to 1600 mT (twice), 800 mT and negligible static field exposure. The order of exposure was assigned at random and was masked by placing volunteers in a tent to hide their position relative to the magnet bore. Volunteers completed a test battery assessing auditory working memory, eye-hand co-ordination, and visual perception. During three sessions the volunteers were instructed to complete a series of standardized head movements to generate additional time-varying fields (similar to 300 and similar to 150 mT . s(-1) r.m.s.). In one session, volunteers were instructed to keep their heads as stable as possible. Performance on a visual tracking task was negatively influenced (P

Original languageEnglish
Pages (from-to)247-255
Number of pages9
Issue number4
Publication statusPublished - May 2007


  • cognitive effects
  • MRI
  • exposure
  • case-crossover
  • ultra-high field
  • stray fields

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