To Run the classic bi-exponential IVIM fitting on a single data set you can use the provided example script with the paramter file. For the toml file see.
With Model: $ S(b) = f_1 \exp (-b_{values} \cdot D_1) + f_2 \exp(-b_{values} \cdot D_2)$
For running a NNLS fitting without regularisation using the parameter file use the following script.