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Introduction and Acknowledgements

This work is part of the National Alliance for Medical Image Computing (NA-MIC), funded by the National Institutes of Health through the NIH Roadmap for Medical Research, Grant U54 EB005149. Information on NA-MIC can be obtained from the NA-MIC website.
Author: Alex Yarmarkovich, Isomics, SPL
Contact: Alex Yarmarkovich,

Isomics, Inc.  
National Alliance for Medical Image Computing (NA-MIC)  
Neuroimage Analysis Center (NAC)  

Module Description

Transform module is used for creating and editing transformation matrices.

Use Cases

Most frequently Transform module is used for these scenarios:

  • Manual Registration: You can insert a transformation node into your scene, and in the Data module drag a volume or a model under it,

making them children of the transformation node. After that any changes to the transformation matrix of this node will be applied to the display of children volumes and models.


Panels and their use

  • Load panel:
    • Load Transfrom button: brings a file browser allowing user to load a previously saved transformations from ITK style .tfm file. The .tfm files are also created by slicer when saving a scene containing transformation nodes.
  • Display and Edit panel:
    • Transform node selector: selects an existing transformation node or creates a new one and adds it to the scene.
    • Transform Matrix: displays values and allows editing of individual components of 4x4 transformation matrix.
    • Translation panel: allows editing of LR, PA, and IS translational components of the transformation matrix in the RAS space. Also, allows changing the min/max range of the slider in order to accommodate larger or smaller measurements.
    • Rotaion panel: allows editing of LR, PA, and IS rotation angles in the RAS space.
    • Coordinate Reference toggle: switches between global RAS space transformation and a local one, relative to the current position and orientation.
    • Identity button: resets transformation matrix to identity.
    • Revert button: inverts the transformation matrix.
Transfrom module panel

Similar Modules

  • Related modules: Data module, Registration modules.



Information for Developers