OxfordASLRun

Purpose. Build and execute an oxford_asl command from data_descrip + params. Handles ASL type (PCASL/PASL), TIs/PLDs, bolus, slice timing, structural usage, and calibration.

What it builds

• Contrast ordering: --iaf tc if LabelControl=True else --iaf ct; default --ibf rpt (or as given).

• Timing: computes --tis (PLD+bolus) and --bolus from data_descrip for PCASL/PASL.

• Acquisition: adds --slicedt if SliceDuration is present.

• Structural: -s to anatomical when useStructural=True.

• Calibration: if useCalibration=True, supplies -c (M0), --tr and --alpha.

• Output: sets -o <outdir> (defaults to derivatives mirror).

• Execution: runs with a controlled environment (FSLOUTPUTTYPE=NIFTI_GZ, single-thread OMP, locale-safe).

Inputs

• data_descrip with keys such as: ArterialSpinLabelingType, PLDList, LabelingDuration, BolusCutOffDelayTime, SliceDuration, LabelControl, Images (with asl and optional anat/M0), etc.

Outputs

• Returns {"oxford_asl_out": <outdir>}. Oxford ASL result files are placed in <outdir> by the tool.

Configuration (params)

YAML example

modules:
  - name: OxfordASLRun
    params:
      wp: true
      mc: true
      useStructural: true
      useCalibration: true
      outdir: ./derivatives/oxasl_out