FSL Volume Merge (fslmerge)¶
Library: FSL | Docker Image: brainlife/fsl
Function¶
Concatenates multiple 3D volumes into a 4D time series or merges along any spatial axis.
Modality: Multiple 3D NIfTI volumes.
Typical Use: Combining processed volumes back into 4D, concatenating runs.
Key Parameters¶
-t/-x/-y/-z/-a (merge direction),
Key Points¶
Use -t for temporal concatenation (most common). -a auto-detects axis. Input images must have matching spatial dimensions when merging in time.
Inputs¶
| Name | Type | Required | Label | Flag |
|---|---|---|---|---|
dimension |
enum |
Yes | Dimension to merge along (t=time, x, y, z, a=auto) | - |
output |
string |
Yes | Output merged filename | |
input_files |
File[] |
Yes | Input files to merge | |
tr |
double |
No | TR in seconds (when merging in time) |
Accepted Input Extensions¶
- input_files:
.nii,.nii.gz
Outputs¶
| Name | Type | Glob Pattern |
|---|---|---|
merged_image |
File |
$(inputs.output).nii.gz, $(inputs.output).nii |
log |
File |
$(inputs.output).log |
Output Extensions¶
- merged_image:
.nii,.nii.gz
Docker Tags¶
Available versions: latest, 6.0.4-patched2, 6.0.4-patched, 6.0.4, 6.0.4-xenial, 5.0.11, 6.0.0, 6.0.1, 5.0.9
Categories¶
- Utilities > FSL > Volume Operations