Table 1.

Computation time of each preprocessing step for three software packages.

	fMRIPrep	FSL	FuNP
First N volumes removal	N/A	7.4 m(0.5 m)	7.4 m(0.5 m)
Slice timing correction	N/A	N/A	N/A
Volume scrubbing	N/A	N/A	26.8 m(0.4 m)
Motion correction	1 h 26.6 m(6.3 m)	2.2 m(0.4 m)	6.2 m(0.8 m)
Non-brain tissue removal	6.4 m(5.0 m)	4.2 m(0.4 m)	4.6 m(0.5 m)
Intensity normalization	N/A	1.2 m(0.4 m)	1.2 m(0.4 m)
Registration	4 h 52.0 m(1 h 3.2 m)	1.1 m(0.3 m)	12.0 m(2.0 m)
Nuisance variable removal	9 h 25.0 m(1 h 45.2 m)	11 h 0.2 m(1 h 8.8 m)	1 h 29.2 m(10.5 m)
Temporal filtering	1.1 m(0.3 m)	3.2 m(0.4 m)	3.2 m(0.4 m)
Spatial smoothing	N/A	1.8 m(0.4 m)	1.8 m(0.4 m)
Total	11 h 6.6 m(12.9 m)	11 h 35.0 m(52.6 m)	2 h 55.0 m(11.2 m)

Means and SDs are reported. SD values are reported in parentheses. h, hour; m, minute; N/A, not available.