Sumit Kaushik presents Geodesic Fiber Tracking in White Matter using Activation Function

On 2020-09-22 11:00:00 at G205, Karlovo náměstí 13, Praha 2
The geodesic ray-tracing method has shown its
effectiveness for the reconstruction of fibers in white matter
structure. It provides multiple solutions and is robust to noise and
curvatures of fibers. The choice of the metric tensor has a
significant impact on the outcome of this method. The existing
metrics are not sufficient in the construction of white matter tracts
as geodesics. We propose a way to choose the appropriate
conformal class of metrics where the metric gets scaled according
to tensor anisotropy. We used the logistic functions, which are
commonly used in statistics as cumulative distribution functions.
To prevent deviation of geodesics from the actual paths, we
propose a hybrid ray-tracing approach. Furthermore, we employ
diagonal projection of 4th order tensor to perform fiber tracking in
crossing regions. Results from synthetic and real data experiments
elucidate the method.

Sumit Kaushik has a PhD from MU Brno. He is now a postdoc with Jan Kybic.
Responsible person: Petr Pošík