Fiber Viewer

NORA includes  fiberviewer based on webGL and Babylon.js. The main features are:

Supports TCK (mrtrix) and TRK (TrackVis) formats

Fiber Manipulations

Interactive selection by variable sized spheres

Interactive deletion by variable sized sphere

Selection and Deletion of tracts by ROIs

Selection by sphere sets, (annotation type: poinset)

Selection by waypoints (annotation type: freeline)

Selection by DBS electrodes

Rendering

Vistmaps (fiber densities)

Terminalmaps

LIveupdate of visit/terminal maps

Tracking

a simplistic fibertracking algorithm based on tensor/orientationl fields is provided

Starting the fiber viewer

Choose an appropriate background image (like a T1w) and simply drop a tck or trk file into a viewport and the viewer will automatically switch to 3D mode a displays the fibers. An additional viewbar appears, which is associated with the loaded tracts. The viewbars allows you manipulate the streamlines, select subsets, etc. Here a short overview:

Fiber Selection

Manually:Hold Shift key pressed, a yellow sphere appears when hovering with mouse over the tracking, click to select all fibers going through the

By ROI:

By Annotation:

Cropping Selections and iterative selections.

Some slides explaining NORA' s fiber viewer