Slicer-IGT/ForDeveloppers

Summery

‘’’Slicer for IGT’’’ is an extension of 3D Slicer designed and customized for Image Guided Therapy. 3D Slicer is comprehensive medical image processing and visualization software for medical image computing. There are many technical advantages to use Slicer for IGT research.

• Access to state of art medical image-to-image registration and segmentation algorithm
• Interface for commercial tracking device available in the market
• State-of-art patient-to-image registration methods
• Multi-platform support (Linux, Windows, Mac OS)
• Add your own software as command-line-based C or C++ program without binding it to specific toolkit or language
• Active discussion and collaboration with Image Guided Therapy researchers
• Real-time image transfer from MRI/CT/US (partially available)
• Access to tracking and registration data from a commercial navigation system (not yet available)

Objective

The objective of this page is to understand the architecture of Slicer IGT and build your own module using on Slicer.

Architecture

Slicer and Opentracker

Slicer and Opentracker

Slicer for IGT uses an external software Opentracker (including libopentracker.so) to access tracking and imaging devices. Slicer for IGT also links library version of Opentracker (again libopentracker.so) in it self. As is shown in Figure on the right, Slicer and Opentracker act as two separate software each loading its specific configuration files (config.xml and config.xml_1). The figure also show tha each loads identical library (libopentracker.so). The Optracker software can also run on a separate computer on the net and send tracker reading over the net (Opentracker on net). Note it is opentracker, not Slicer, that connects to the tracking device.

Inside Slicer for IGT

Blockdiagram of the IGT module

IGT developer should focus on writing codes in two subcomponents in Slicer: Modules and IGT Libs. Deteiled instruction to make your own software on the top of Slicer can be found http://wiki.na-mic.org/Wiki/index.php/Slicer3:Developers. However, the following instruction will focus only on two most important parts (a Module and IGT Lib) your will be mainly adding/creating codes.

Module represents a page window in Slicer, where developers can design appliation specific GUI and associated C++ codes. The codes are usually stored in one directory under Module directory of Slicer, and self-containing for one application. One application directory have one Gui class and Logic class. Instruction to build a module can be found at How to add an interactive module.

IGT lib is part of the library in the Lib directory of the codes. This is the library where people should contribute codes to share among IGT applications. The application specific codes should go into a Module. As a starting set of shared codes, we developed three groups of classes in the IGT library. Those are classes for interfacing to tracker and imaging devices, patient-to-image registration, and tool calibration. UML description of each group of classes can be found here.

Source Code Download

• Slicer3-IGT downloading and building
• Build and Run SPLOT on Dell Laptop Inspiron 1501 (Fedora Core 6)

Version notes

SVN

Documentation

Doxygen-generated documentation

Links

Slicer3 main page