DWI grouping for sub-01
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Output "sub-01_dir-AP" (MultipartID auto+concat+0 [inferred]): 1 series
  Distortion group sub-01_dir-AP (PE j-, TRT 0.05s):
    - sub-01_dir-AP_dwi.nii.gz
    corrected by: auto+synb0 [inferred]

Fieldmap estimations:
  auto+synb0 [inferred]: SyNb0 synthetic b=0
    - sub-01_T1w.nii.gz

Processing preview: eddy + TOPUP (--hmc-method eddy --sdc-method topup)
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Output "sub-01_dir-AP" (1 single series):
  1. The series is denoised.
  2. SyNb0 synthesizes an undistorted b=0 image from the T1w (sub-01_T1w.nii.gz).
  3. TOPUP estimates the susceptibility field from the acquired b=0 images plus the synthetic b=0, which enters as a zero-readout-time volume (an extra row in the acquisition-parameters file).
  4. eddy corrects head motion, eddy currents, and susceptibility distortion in one model, using the TOPUP field.
  5. The corrected series is written as one output file.

Processing preview: TORTOISE + DRBUDDI (--hmc-method tortoise --sdc-method drbuddi)
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Output "sub-01_dir-AP" (1 single series):
  1. The series is denoised.
  2. TORTOISE DIFFPREP corrects head motion and eddy currents.
  3. SyNb0 synthesizes an undistorted b=0 image from the T1w (sub-01_T1w.nii.gz) and the DIFFPREP-corrected b=0; TOPUP pairs the two (the synthetic b=0 as a zero-readout-time volume), and the resulting field is applied to unwarp the DIFFPREP output.
  4. The corrected series is written as one output file.

Processing preview: eddy + TOPUP→DRBUDDI (--hmc-method eddy --sdc-method topup+drbuddi)
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Output "sub-01_dir-AP" (1 single series):
  1. The series is denoised.
  2. SyNb0 synthesizes an undistorted b=0 image from the T1w (sub-01_T1w.nii.gz); TOPUP treats it as a zero-readout-time volume, and eddy corrects head motion, eddy currents, and susceptibility distortion in one model using the resulting field. With no reverse phase-encoded dMRI series the DRBUDDI second stage does not run.
  3. The corrected series is written as one output file.

Processing preview: SHORELine + DRBUDDI (--hmc-method shoreline --sdc-method drbuddi)
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Output "sub-01_dir-AP" (1 single series):
  1. The series is denoised.
  2. SHORELine iteratively corrects head motion by registering each volume to a 3dSHORE signal-model prediction (eddy currents are not corrected).
  3. SyNb0 synthesizes an undistorted b=0 image from the T1w (sub-01_T1w.nii.gz) and the SHORELine-corrected b=0; TOPUP pairs the two (the synthetic b=0 as a zero-readout-time volume), and the resulting field is applied to unwarp the corrected series.
  4. The corrected series is written as one output file.
