Probabilistic Fiber Tracking at UHF: Effects of Distortion Correction and Reverse Phase Polarity Combination.
Oleg P Posnansky 1 , Myung-Ho In 1 , and Oliver Speck 1
Institute of Experimental Physics,
Department of Biomedical Magnetic Resonance,
Otto-von-Guericke University, Magdeburg, Germany
In this study, an analysis of probabilistic fiber
tracking was performed using extended point spread
function mapping to demonstrate that accurate distortion
correction and combination of echo-planar images with
opposite phase-encoding polarity is important to
optimally preserve spatial information. Reverse gradient
polarity methods suggested previously were also applied
for comparison. The results demonstrate that the
probabilistic connectivity density can be improved by
these corrections. Therefore, optimally preserving
spatial information from the image pair can refine the
structural connectivity data.
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