Abstract #2577
Investigation of artificial increase of fractional anisotropy (FA) due to truncation artifact in DTI data and compensation using total variation constrained data extrapolation
Daniel Gllmar 1 , Ferdinand Schweser 1 , and Jrgen R Reichenbach 1
1
Medical Physics Group, Institute of
Diagnostic and Interventional Radiology I, Jena
University Hospital - Friedrich Schiller University
Jena, Jena, Germany
Artificial increase in fractional anisotropy occurs due
to truncation artifacts in b0 (unweighted) images in DTI
data. This artifact can be reduced using total variation
constrained data extrapolation. Uncorrected and
corrected data were used to obtain FA maps and the
differences were investigated in a detailed ROI based
analysis. This analysis showed a clear dependence of the
artifact with respect to pial surface distance as
expected from the theory.
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