Abstract #3025
Orientation mapping in visual areas at Ultra High Field
Keren Yang 1 , Rosa Sanchez Panchuelo 1 , Denis Schluppeck 2 , Richard W. Bowtell 1 , and Susan T. Francis 1
1
Sir Peter Mansfield Magnetic Resonance
Centre, University of Nottingham, Nottingham,
Nottinghamshire, United Kingdom,
2
School
of Psychology, University of Nottingham, Nottingham,
Nottinghamshire, United Kingdom
We use ultra-high field (7 Tesla) fMRI to assess
orientation mapping in dorsal and ventral visual areas
(V1, V2, V3). Within visual areas, the phase value of
orientation maps are compared with those of
angular-position from retinotopic maps, and are shown to
display a high correlation (P<0.0001). Repeatability is
shown to be high for both retinotopic and orientation
maps. BOLD CNR is assessed as a function of number of
repeat scans of orientation maps, with CNR being a
factor of ~4 lower for orientation maps compared to
retinotopic maps.
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