In the course of the research project MEDVIS 3D, a clinical software application has been developed, capable of 3D reconstruction, visualization and blood flow simulation of intracranial aneurysms based on 2D medical image data.

This system is now being extended with the functionality of a physically correct simulation of blood flow through aneurysms. It shall provide the means to estimate rupture risks by calculating the distribution of pressure and shear stresses in the aneurysm, in order to support the planning of clinical interventions via the Finite Element Method (FEM). In order to minimize computation time, the simulation will also be parallelized and distributed to the computers of the Austrian Grid network. Our goal is to provide a simulation system without any third-party licenses that is available for every hospital.

The research project MEDVIS 3D was initiated in 2005 by two hospitals in Upper Austria (Wagner Jauregg Landesnervenklinik and Allgemeines Krankenhaus der Stadt Linz) with the goal of developing a clinical software application, that should be capable of 3D reconstruction and visualization of intracranial aneurysms based on 2D medical image data. Therefore, several existing visualization libraries have been evaluated and the choice was made to develop a new compact and fast visualization framework in order to be independent of third-party libraries. A new visualization library named REVOLTE was the result of two master theses. This library was the basis for the clinical software tool that was developed especially fulfilling the needs for visualizing and measuring intracranial aneurysms. The fist version of MEDVIS3D was released and deployed after 3 years of development in the two participating hospitals. This version included, besides the basic requirements for 3D reconstruction and visualization of medical images, the following modules:

  • DICOM Series Import and Navigation
  • Synchronized Multi-Series Navigation
  • DICOM Image False-Color Palette Modification
  • 3D Reconstruction of Partial Volumes
  • 2D Snapshot Generation
  • Various 3D Segmentation Methods:
    • Clipping
    • Cutting
    • 3D Rubber
    • Denoising
    • Region Growing
  • 3D Volume and Distance Measuring
  • Orthogonal Plane Extraction
  • Parallel Visualization of 2 Volumes (2D Transfer Function)
  • 3D Isosurface Extraction (Advanced Skeleton Climbing, Marching Cube)
  • Lighting and Shading
  • Raw 3D Volume Persistence (Fast Reloading)
  • Automatic Aneurysm Detection
  • Detection and Removal of Blood Vessels
  • Simulation of Blood Flow (CFD) and Vessel Wall Displacement (CSD, FSI)

The development goal for the next years is the implementation of a realistic and physically correct haptic surgery simulator for intracranial clipping surgeries.

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