aslprep.workflows.asl.hmc module

Workflows for estimating and correcting head motion in ASL images.

init_asl_hmc_wf(mem_gb, omp_nthreads, name='asl_hmc_wf')[source]

Build a workflow to estimate head-motion parameters.

This workflow estimates the motion parameters to perform HMC over the input ASL image.

Workflow Graph
../_images/aslprep-workflows-asl-hmc-1.png

(Source code, png, svg, pdf)

Parameters:

  • mem_gb (float) – Size of ASL file in GB

  • omp_nthreads (int) – Maximum number of threads an individual process may use

  • name (str) – Name of workflow (default: asl_hmc_wf)

Inputs:

  • asl_file – ASL series NIfTI file

  • raw_ref_image – Reference image to which ASL series is motion corrected

Outputs:

  • xforms – ITKTransform file aligning each volume to ref_image

  • movpar_file – MCFLIRT motion parameters, normalized to SPM format (X, Y, Z, Rx, Ry, Rz)

  • rms_file – Framewise displacement as measured by fsl_motion_outliers