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TRACKER is a software system for frameless neuronavigation. TRACKER depends on external hardware, mainly an optical system that measures the 3D position of either active or passive markers affixed to specific tools for surgical procedures.

Using the information from the optical system TRACKER is able to show the position of tools inside the surgical volume in real time, at a rate of 15 frames per second. The surgical volume could be created from sets of magnetic resonance images (MR) or computed tomography images (CT).

The communication between TRACKER and the optical system uses an independent driver that conforms a modular design to ease the implementation of new optical systems. Implementing a new camera means writing a new communication driver keeping untouched the rest of TRACKER's code.

TRACKER is embedded into neuronavigation systems from several manufacturers.

The main features of TRACKER are:
• Image registration by surface matching.
• Image registration with reference points.
• Image registration under user manual control.
• Support for DICOM images imported via network, CD/DVD or USB pendrives.
• Up to 1024 images (slices) per plan.
• Renderization of the anatomy and surgical tools in 2D and 3D.
• Projection of the surgical pointer in real time into multiple planes simultaneously (axia, coronal, sagital) and 3D.
• Renderization of surgical volume from the tool point of view (BEV).
• Multimoda image registration and fusion.
• Support for varios instances of TRACKER running simultaneously on different image sets. In this case the use of two or more monitors is highly recommended.
• Tools for drawing region of interest (ROIs). Use of automatic and manuall segmentation techniques.
• ROI representation in 2D and 3D scenes.

Version History
Version 1.00.5
•    Support for a new license control device.  Implementation for using NeoKey cryptographic USB dongles.
•    Improved consistency of patient name while identifying sequences in NEW plans.
•    Improved DICOM filter with support for JPEG2000 transfer syntax, including lossless and lossy compression modes. Better handling of RGB dicom files. Easy image rotation for large angles, via “Options” and “Rotation angle”. Dicom.exe moved to version 5.26.