Projects/Diffusion/Contrasting Tractography Measures/Slicer Tractography
Slicer Tractography: Whole Brain Seeding
Whole brain seeding followed by selection between two ROIs. Using eddy-corrected data set, without downsampling.
Tensor estimation in DTMRI module in Slicer 2.8.
Uses automatic brain mask generated in conversion step to prevent tracking in ventricles and outside the brain.
Tracts are seeded at a resolution of 2mm at points where cL > 0.3; tracking stops when cL drops below 0.15. Tracts shorter than 20mm are discarded. Remaining tracts are saved to disk as separate .vtk files.
Tract selection
Using LaurenThesis module in Slicer 2.8, tracts are selected that pass through 2 specified ROIs.
For the arcuate fasciculus, no tracts where selected connected the two ROIs.
Measurement
For all tracts, mean scalar measures were computed along each individual tract, then combined into a single average measure for each group of tracts.
For the Cingulum, left and right sides were measured separately
| Case | Uncinate Fasciculus | Internal Capsule | Fornix | Cingulum (Left) | Cingulum (Right) | Arcuate Fasciculus |
|---|---|---|---|---|---|---|
| caseD00917 | ||||||
| caseD00920 | ||||||
| caseD00924 | ||||||
| caseD00925 | ||||||
| caseD00928 | ||||||
| caseD00935 | ||||||
| caseD00936 | ||||||
| caseD00938 | ||||||
| caseD00939 | ||||||
| caseD00940 |
