TIRIUS - Tomographic Image Reconstruction Interface of the Université de Sherbrooke
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  Introduction

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The Tomographic Image Reconstruction Interface of the Université de Sherbrooke (TIRIUS) is a user-interface software for reconstructing 3D images from projection data acquired with real imaging systems and/or with camera modeled with the GATE Monte Carlo simulator. TIRIUS currently only support projection data from Positron Emission Tomography (PET) but other imaging modalities like SPECT and CT could be supported in futur releases. The TIRIUS project is currently maintained by Jean-Daniel Leroux, Ph. D. student at the Université de Sherbrooke. If you have any contributions you would like to be posted in the next release of TIRIUS, please communicate with Jean-Daniel by email. For any questions, problems or bug reports relating to TIRIUS, please use the Mailing lists. Questions will not be answered directly by email.

  Overview / Screenshots

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The TIRIUS software is a Qt-based user interface written in C object-oriented language. TIRIUS architecture was thinked in order to facilitate the inclusion of new algorithm objects and of new object for converting projection data coming from different apparatus or from GATE Monte Carlo simulator with minimal coding from the developer.  Moreover, the Qt-based user interface unable to use the same source package for compilation under Windows and Linux environment. As one can see from the screen shot shown above, TIRIUS is composed of four main interface windows: The TIRIUS window The Frame Selector window The Image Viewer window The Projection Data Converter window The TIRIUS window is used to select an image reconstruction algorithm, load a system matrix optimized for a given camera, load projection data measured by the given camera and launching the image reconstruction procedure. The Frame Selector windowis used to select which frames to reconstruct for cases where the sinogram data comprise different acquisition frames like time frames, bed position frames, gated signal frames and clam double sampling frames. The Image Viewer windowis used to display the 3D reconstructed image. Since only 2D images display is supported by TIRIUS, a slide bar allow to select which slice of the 3D image to display. Other functionnalities for rescalling and controlling the contrast of the image have also been implemented. Up to four image Viewer can be active at a time. The 3D image can also be saved into different format and reloaded by more powerful software for the processing and the three-dimensionnal display of the images. The Projection Data Converter windowis used to convert projection data (list mode acquisition or sinogram data) into a suitable sinogram format that can be read by the TIRIUS software and use for the image reconstruction procedure. This window is composed of three different interface pages. The first page allows loading projection data acquired with "real" imaging systems and to convert them into a sinogram format suitable for TIRIUS. The second page allows to read simulated data produced by the GATE Monte Carlo simulator and to convert them into a sinogram format suitable for TIRIUS. The last page allows to control which information should be saved in the sinogram output for TIRIUS (i.e. prompts, randoms, scatters, normalization factor, object attenuation factor, etc..).  This is a very short introduction of the TIRIUS software. For more information, please consult the Features section and the Documentation section.

 
  Current release

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Beta release v1.0 is the only available release. Source package can be downloaded from the Download section or can be access directly from sourceforge.net.

  News

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23/10/08 - First beta release of TIRIUS is now available.

  Authors

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Sherbrooke Molecular Imaging Center (SMIC), Université de Sherbrooke. Groupe de Recherche en Appareillage Médicale de Sherbrooke (GRAMS), Université de Sherbrooke. The Tomographic Image Reconstruction Interface of the Université de Sherbrooke (TIRIUS) is developed and maintained by the Sherbrooke Molecular Imaging Center (SMIC) of the Université de Sherbrooke. This group of research is under the direction of professor Roger Lecomte, Ph. D. The TIRIUS project is also developped in collaboration with the Groupe de Recherche en Appareillage Médical de Sherbrooke (GRAMS) under the direction of Réjean Fontaine, ing. Ph. D.    Jean-Daniel Leroux, Ph. D. student in Electrical Engineering, Université de Sherbrooke. Main author of the TIRIUS project. Person currently in charge of the TIRIUS project. Research topic: Development of ultra-fast tomographic image reconstruction methods based on cylindrical image representations. For more information:  www.pages.usherbrooke.ca/jdleroux Philippe Lavoie, Bachelor student in Electrical Engineering, Université de Sherbrooke. Design most aspects of the TIRIUS user-interface. Christian Thibaudeau, M. student in Electrical Engineering, Université de Sherbrooke Contribute to the GATE Monte Carlo simulations aspects of TIRIUS. Research topic: Image reconstruction for counting mode Computed Tomography (CT)..