LiveWire is a free 2D interactive tool for medical image segmentation based on the live-wire-on-the-fly algorithm.
The segmentation consists of tracing, interactively, a closed contour
which describe the boundary of an object.
The software is written in C and Tcl/Tk, and is available for
Windows and Linux platforms.
Supported input formats: GIF, PPM, PGM and SCN.
Supported output formats: PGM and SCN.