The National Library of Medicine Insight
Segmentation and Registration Toolkit (ITK) is a
software system to support the Visible Human
Project. Segmentation is the process of
identifying and classifying data found in a
digitally sampled representation. Registration is
the task of aligning or developing correspondences
between data. For example, in the medical
environment, a CT scan may be aligned with an MRI
scan in order to combine the information contained
in both.