Realign (SPM)

Purpose. Motion-correct ASL time series using SPM Realign (Nipype wrapper).

Inputs

• For each {asl}: perf/{asl}.nii under the derivatives mirror.

Outputs

• SPM realign outputs (mean images, realigned series) written in place following SPM’s write_which/register_to_mean behavior.

Configuration

Key	Type / Default	Meaning
quality	float / 0.9	SPM quality (0–1)
fwhm	float / 5	Smoothing kernel for estimation
register_to_mean	bool / True	Register to mean image
jobtype	str / estwrite	estimate or estwrite
interp	int / 1	Interpolation (1=trilinear)
wrap	list / [0,0,0]	SPM wrap flags
write_mask	bool / True	Write implicit mask
write_which	list / [2,1]	Which images to write

YAML example

modules:
  - name: Realign
    config:
      quality: 0.9
      fwhm: 5
      register_to_mean: true
      jobtype: estwrite