Developed by Michael Hallquist
As the pipeline progresses it outputs files with distinct prefixes that describe each step in reverse order. e.g. final output might be brnwsdktm_func_4.nii.gz where motion correction was the first preproc step preformed and bandpassing the last.
br | bandpass and nuisance regresssion (simultaneous to not re-intro noise from one to the other) – used in resting state |
f | high pass filter. used for task (cf. b full bandpass) |
n | voxel normliazation (prob to 1000*x/median) |
s | smoothing. also prepends the FWHM size to the end (_4) |
w | warp (“spatial normalization”). likely to MNI 2009c Asym template |
d | despike (with wavelets) |
k | skull strip |
t | slice time correct. usually done at the same time as motion below (via 4dslicealign.py) |
m | motion: realign (6dof affine – trans and rot) every timepoint to the mean so a voxel is in the same spot over time |