ITK-SNAP is a free, open-source, multi-platform software application used to segment structures in 3D and 4D biomedical images.

This latest version of ITK-SNAP provides powerful new features for working with multiple scans of the same subject, including registration. It also provides tools for interpolating segmentations and improved DICOM support.

ITK-SNAP Nightly Builds (latest and greatest) The files below are the latest nightly builds of the code in the ITK-SNAP master branch. Some features may not work properly.

What Exactly Does SNAP Do? SNAP provides a set of tools to make segmentation of volumetric data easier and faster. SNAP can be used in two different modes: manual segmetnation and semi-automatic segmentation. The manual mode is used for segmentation using hand contouring and for cleaning up the results of automatic segmentation.

ITK-SNAP Documentation: Version 3.x Web-based documentation for the latest version of ITK-SNAP is under development. For new users we recommend viewing the training videos below. Web-based tutorials for ITK-SNAP 2.x are also still largely relevant.

SNAP provides a set of tools to make segmentation of volumetric data easier and faster. SNAP can be used in two different modes: manual segmetnation and semi-automatic segmentation.

Tutorial: Getting Started with ITK-SnAP Welcome to SnAP! This guide will introduce you to the most commonly used features of the software. The tutorial is organized into eight sections, and requires about 60 minutes to complete. Click the first link in te list below to begin the tutorial.

This section of the tutorial will guide you through downloading and installing the latest version of ITK-SNAP for Apple MacOS, Windows, and Linux. It will take 5 to 10 minutes to complete.

This section describes how SNAP can be used for manual segmentation. You will learn about working with segmentation labels, painting regions ontwo-dimensional slices of the image, and saving and loading segmentation results.

ITK-SNAP documentation is a work in progress. There is a tutorial that was written in 2004, which remains largely relevant today, but does not include all of the recent features.