Abstract #1027
Time to move on: an FOD-based DEC map to replace DTI's trademark DEC FA
Thijs Dhollander 1 , Robert Elton Smith 1 , Jacques-Donald Tournier 2,3 , Ben Jeurissen 4 , and Alan Connelly 1,5
1
The Florey Institute of Neuroscience and
Mental Health, Melbourne, Victoria, Australia,
2
Centre
for the Developing Brain, King's College London, London,
United Kingdom,
3
Department
of Biomedical Engineering, King's College London,
London, United Kingdom,
4
iMinds-Vision
Lab, University of Antwerp, Antwerp, Belgium,
5
The
Florey Department of Neuroscience, University of
Melbourne, Melbourne, Victoria, Australia
The "traditional" directionally-encoded colour (DEC) FA
map is an icon of DTI, but is also affected by its
inherent flaws. The first eigenvector is known to be
ill-defined in regions of crossing fibres, resulting in
misleading specific DEC values as well as "false edges"
in the overall map. Additionally, the FA shows naturally
low values in these regions. In a clinical setting, this
might potentially lead to false positive findings; but
also to false negative ones in case these false features
mask out or otherwise distract from real pathological
features. We propose an FOD-based DEC map that solves
these issues.
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