aslprep.workflows.asl.t2s module

Generate T2* map from multi-echo ASL images.

init_asl_t2s_wf(echo_times, name='asl_t2s_wf')[source]

Combine multiple echos of ME-EPI.

This workflow wraps the tedana T2* workflow to optimally combine multiple echos and derive a T2* map. The following steps are performed:

  1. HMC on individual echo files.

  2. Compute the T2* map

  3. Create an optimally combined ME-EPI time series

Workflow Graph
../_images/aslprep-workflows-asl-t2s-1.png

(Source code, png, svg, pdf)

Parameters:

  • echo_times (list) – list of TEs associated with each echo

  • 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_t2s_wf)

Inputs:

asl_file – list of individual echo files

Outputs:

asl – the optimally combined time series for all supplied echos