ITK-SNAP

ITK-SNAP is a software application used to segment structures in 3D medical images. It provides semi-automatic segmentation using active contour methods, as well as manual delineation and image navigation.

In addition to these core functions, SNAP provides a number of supporting utilities. Some of the core advantages of SNAP include:
- Linked cursor for seamless 3D navigation
- Manual segmentation in three orthogonal planes at once
- Friendly UI for selecting active contour segmentation parameters
- Support for many different 3D image formats, including NIfTI
- Support for concurrent, linked viewing and segmentation of multiple images
- Limited support for color images (e.g., diffusion tensor maps)
- 3D cut-plane tool for fast post-processing of segmentation results