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Magma

, Volume 1, Issue 3–4, pp 109–113 | Cite as

A possible role of in-flow effects in functional MR-imaging

  • gregor Gomiscek
  • Roland Beisteiner
  • Karl Hittmair
  • Edgar Mueller
  • Ewald Moser
Papers

Abstract

The potential of functional MR-imaging at 1.5 T was studied using optical stimulation of the human brain. Differences in the image intensity of up to 30% were obtained in the visual cortex area, correlating with the time course of the stimuli. A simplified semi-quantitative model describing the role of in-flow effects in brain vessels on signal increase during the stimulation period is presented.

Keywords

magnetic resonance blood in-flow effects gradient echo functional imaging visual stimulation 

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Copyright information

© Chapman & Hall 1993

Authors and Affiliations

  • gregor Gomiscek
    • 1
    • 2
  • Roland Beisteiner
    • 3
  • Karl Hittmair
    • 2
  • Edgar Mueller
    • 4
  • Ewald Moser
    • 1
    • 2
  1. 1.Arbeitsgruppe NMR, Institut für Medizinische PhysikUniversity of ViennaAustria
  2. 2.MR-InstitutUniversity of ViennaAustria
  3. 3.Neurologische Universitäklinik, University of ViennaAustria
  4. 4.Austria Siemens MedizintechnikErlangenGermany

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