Nicholas Paul Blockley1, Ian D. Driver2, Susan T. Francis2, Joseph A. Fisher3, Penny A. Gowland2
1SPMMRC, School of Physics and Astronomy, University of Nottingham, Nottingham, UK; 2SPMMRC, School of Physics and Astronomy,, University of Nottingham, Nottingham, UK; 3University of Toronto, Toronto, Ontario, Canada
Changes in oxygen concentration in the nasal cavity during a hyperoxic challenge cause a variation in the susceptibility gradient at the sinus-tissue interface. We found that this caused a measurable dipolar pattern of signal change in slices inferior to the corpus callosum along with more subtle changes in superior slices. This artefact will be