AFNI 3D Fractionize (ROI Resampling)¶
Library: AFNI | Docker Image: brainlife/afni
Function¶
Resamples ROI/atlas datasets using fractional occupancy to maintain region representation at different resolutions.
Modality: ROI/atlas volume (3D NIfTI/AFNI) plus template for target grid.
Typical Use: Resampling parcellations to functional resolution.
Key Parameters¶
-template (target grid), -input (ROI dataset), -prefix (output), -clip (fraction threshold, default 0.5)
Key Points¶
Better than nearest-neighbor for resampling parcellations. Preserves small ROIs better.
Inputs¶
| Name | Type | Required | Label | Flag |
|---|---|---|---|---|
template |
File |
Yes | Template dataset defining output grid | -template |
input |
File |
Yes | Input dataset to fractionize | -input |
prefix |
string |
Yes | Output dataset prefix | -prefix |
clip |
double |
No | Occupancy threshold (0-1 fraction, 1-100 percent, 100+ direct value) | -clip |
warp |
File |
No | Transformation from +orig to input coordinates | -warp |
preserve |
boolean |
No | Copy nonzero input values instead of creating fractional mask | -preserve |
vote |
boolean |
No | Use voting mechanism (same as -preserve) | -vote |
Accepted Input Extensions¶
- template:
.nii,.nii.gz,+orig.HEAD,+orig.BRIK,+tlrc.HEAD,+tlrc.BRIK - input:
.nii,.nii.gz,+orig.HEAD,+orig.BRIK,+tlrc.HEAD,+tlrc.BRIK - warp:
.nii,.nii.gz,+orig.HEAD,+orig.BRIK,+tlrc.HEAD,+tlrc.BRIK
Outputs¶
| Name | Type | Glob Pattern |
|---|---|---|
fractionized |
File |
$(inputs.prefix)+orig.HEAD, $(inputs.prefix)+tlrc.HEAD |
log |
File |
$(inputs.prefix).log |
Output Extensions¶
- fractionized:
+orig.HEAD,+orig.BRIK,+tlrc.HEAD,+tlrc.BRIK
Docker Tags¶
Available versions: latest, 16.3.0
Categories¶
- Utilities > AFNI > ROI Utilities