ReconstIvimFlow

Workflow for Intra-voxel Incoherent Motion reconstruction and for computing IVIM metrics. Performs a IVIM reconstruction on the files by ‘globing’ input_files and saves the IVIM metrics in a directory specified by out_dir.

Parameters

input_files : string
Path to the input volumes. This path may contain wildcards to process multiple inputs at once.
bvalues_files : string
Path to the bvalues files. This path may contain wildcards to use multiple bvalues files at once.
bvectors_files : string
Path to the bvalues files. This path may contain wildcards to use multiple bvalues files at once.
mask_files : string
Path to the input masks. This path may contain wildcards to use multiple masks at once. (default: No mask used)
split_b_D : int, optional
Value to split the bvals to estimate D for the two-stage process of fitting (default 400)
split_b_S0 : int, optional
Value to split the bvals to estimate S0 for the two-stage process of fitting. (default 200)
b0_threshold : int, optional
Threshold value for the b0 bval. (default 0)
save_metrics : variable string, optional
List of metrics to save. Possible values: S0_predicted, perfusion_fraction, D_star, D (default [] (all))
out_dir : string, optional
Output directory (default input file directory)
out_S0_predicted : string, optional
Name of the S0 signal estimated to be saved (default: ‘S0_predicted.nii.gz’)
out_perfusion_fraction : string, optional
Name of the estimated volume fractions to be saved (default ‘perfusion_fraction.nii.gz’)
out_D_star : string, optional
Name of the estimated pseudo-diffusion parameter to be saved (default ‘D_star.nii.gz’)
out_D : string, optional
Name of the estimated diffusion parameter to be saved (default ‘D.nii.gz’)

References

[Stejskal65]Stejskal, E. O.; Tanner, J. E. (1 January 1965). “Spin Diffusion Measurements: Spin Echoes in the Presence of a Time-Dependent Field Gradient”. The Journal of Chemical Physics 42 (1): 288. Bibcode: 1965JChPh..42..288S. doi:10.1063/1.1695690.
[LeBihan84]Le Bihan, Denis, et al. “Separation of diffusion and perfusion in intravoxel incoherent motion MR imaging.” Radiology 168.2 (1988): 497-505.