couple of links / research papers, might interest some....
mri scans to nurbs?
NURBS-based surface generation from 3D images:
spectral construction and data-driven model selection:
https://orca.cardiff.ac.uk/id/eprint/162818/1/qwad082.pdf
NURBSFit: Robust Fitting of NURBS Surfaces to Point Clouds
https://hal.science/hal-05411017v1/file/camera_ready_nurbsfit.pdf
(software on github)