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