Slicer is a freely available, open-source software tool for:

• Diagnostic visualization and surgical planning in the clinic.
• Facilitating medical research in the lab.
• Guiding biopsies and other surgical procedures in the operating room.

Slicer can help users:

• visualize medical image data
• register (align) multiple images for comparison
• segment images to isolate anatomical structures
• create 3-dimensional surface area models based on 2-dimensional data
• perform measurements on images

Slicer has a modular structure so that users can select the functions they need. Users can also develop their own modules, either for their own use or to share with others. Slicer modules are written in Tcl, Tk, and VTK.