[Forschungsseminar-BSV] Forschungsseminar Computergrafik, Bildverarbeitung und Visualisierung

[Christian Heine]

E I N L A D U N G

zum Forschungsseminar Computergrafik, Bildverarbeitung und
Visualisierung am Mittwoch den 2010-04-28, 13:15 Uhr, Raum 1-22 in
der Johannisgasse 26.


Wir hören einen Vortrag von

     Mathias Goldau
     Universität Leipzig

mit dem Titel

     "Visualizing Parameters of White Matter Fiber Bundles"


zum Inhalt:

Diffusion magnetic resonance imaging (diffusion MRI) is so far the 
only medical imaging modality that has the potential for probing 
brain connectivity in vivo. Specifically it provides the data basis 
for a set of techniques (so-called diffusion tractography) allowing 
for tracking of fiber bundles in the brain's white matter. 
Furthermore, due to the micro-structural basis of the diffusion 
process, fiber integrity might be estimated. Typically, this is 
achieved by tensor-derived parameters, such as by fractional 
anisotropy (FA), which allows for a quantification of the 
directionality of local diffusion properties. In neuroscience, such 
parameterization of the diffusion tensor has greatly stimulated 
studies of localized brain changes, related to development, aging, 
or various neurological and psychiatric diseases. However, thus far, 
there is no satisfactory solution for the visualization and 
assessment of such parameters along fiber bundles.

In this talk, we present a novel technique to visualize changes of 
tensor-derived parameters along clusters of the trajectories 
obtained from diffusion tractography. This visualization approach 
consists of two steps: First, an automatic local aggregation of data 
values around the trajectories for quantitative analysis and 
visualization on the fiber bundle boundary and second, a color-coded 
slice that is intuitively movable along the bundle's centerline for 
interactive exploration of the bundle's parameters. This combination 
may facilitate the assessment of micro-structural parameters along 
fiber bundles.



Alle Interessierten sind im Namen von Prof. Dr. Scheuermann herzlich
eingeladen.

Mit freundlichen Grüßen,
Christian Heine