Use SPiCiCAP dataset for future model training

[valosekj]

@sandrinebedard pointed me to the following open-access dataset containing T2w (0.4x0.4x0.8mm) images for 22 healthy subjects:

https://data.mendeley.com/datasets/n2k7zz2xyt/1

@sandrinebedard applied the dorsal rootlets model on this dataset and rootlets segmetnation works pretty well!

Idea: we could use this dataset to enrich our training split for future model training!