aslprep.workflows.asl.reference module
Workflows for generating reference images.
- init_raw_aslref_wf(*, asl_file=None, m0scan=False, use_ge=False, name='raw_aslref_wf')[source]
Build a workflow that generates reference BOLD images for a series.
CBF images have the best GM-WM contrast, but raw ASL files rarely have precomputed CBF volumes. As such, ASLPrep will select volumes in the following order: CBF, M0, deltam, control.
The raw reference image is the target of HMC, and a contrast-enhanced reference is the subject of distortion correction, as well as boundary-based registration to T1w and template spaces.
- Workflow Graph
-
(Source code, png, svg, pdf)
- Parameters:
asl_file (
str
) – ASL series NIfTI filem0scan (
bool
) – True if a separate M0 file is available. False if not.use_ge (
bool
) – If True, the M0 scan (when available) will be prioritized as the volume type for the reference image, as GE deltam volumes exhibit extreme background noise.name (
str
) – Name of workflow (default:asl_reference_wf
)
- Inputs:
asl_file (str) – ASL series NIfTI file
dummy_scans (int or None) – Number of non-steady-state volumes specified by user at beginning of
asl_file
- Outputs:
asl_file (str) – Validated BOLD series NIfTI file
aslref (str) – Reference image to which BOLD series is motion corrected
skip_vols (int) – Number of non-steady-state volumes selected at beginning of
asl_file
algo_dummy_scans (int) – Number of non-steady-state volumes algorithmically detected at beginning of
asl_file