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Insight Segmentation and Registration Toolkit ITK


Allows to perform registration and segmentation for image analysis. Segmentation is the process of identifying and classifying data found in a digitally sampled representation. ITK uses a model of software development known as Extreme Programming. The sampled representation is an image acquired from such medical instrumentation as Computed Tomography (CT), Magnetic Resonance Imaging (MRI) or ultrasound scanners. Registration is the task of aligning or developing correspondences between data. For example, in the medical environment, a CT scan may be aligned with a MRI scan in order to combine the information contained in both.

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ITK classification

ITK specifications

Software type:
Framework/Library, Toolkit/Suite
Restrictions to use:
Programming languages:
Computer skills:
Command line interface
Operating system:
Unix/Linux, Mac OS, Windows
Apache License version 2.0

ITK distribution


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ITK support



  • ITK Team <>

Additional information


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National Library of Medicine, National Institutes of Health, Bethesda, MD, USA; General Electric Corporate Research and Development, Niskayuna, NY, USA; Kitware, Inc. Clifton Park, NY, USA; Insightful, Inc, Seattle WA, USA; Department of Radiology, Univ. of North Carolina at Chapel Hill, Chapel Hill, NC, USA; Computer and Information Science Department, Univ. of Pennsylvania, Philadelphia, PA, USA; School of Computing, Univ. of Utah, Salt Lake City, UT, USA

Funding source(s)

Supported by National Library of Medicine (NLM) and its Visible Human Project™; the National Institute for Dental and Craniofacial Research (NIDCR), the National Eye Institute (NEI), the National Science Foundation (NSF), the National Institute for Neurological Disorders and Stroke (NINDS), the National Institute on Deafness and other Communication Disorders (NIDCD), and the National Cancer Institute (NCI).

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