# Glossary

stl
: A [file format for stereolithography CAD files](https://en.wikipedia.org/wiki/STL_(file_format)) that describes a
triangulated surface consisting of facets and vertices.

Gradient Field
: A magnetic field in the target volume that has a [specific gradient](https://mriquestions.com/gradient-coils.html).

Target Field
: A desired vector field in the desired target volume.