Augmented Reality for Image Guided Surgery
Ansprechpartner: Dr. Christof Rezk-Salama
Background
Augmented reality systems (ARS) compine the physicians real view onto the patient with semi-transparent computer-generated images
of preoperatively acquired CT data. The challenge is to compensate the motion of the patient and non-linear tissue deformation during the intervention.
The framework of our Augmented Reality System is a texture-based volume rendering component on commodity PC hardware which
allows interactive volumetric deformation based on piecewise linear transformations.
The volume is adaptively subdivided into a hierarchy of hexahedra, each of which is deformed linearly. The registration
is implemented as a two-stage procedure. First, we compute a rigid pre-registration with respect to the external fiducial markers
in combination with an electro-magnetic tracking system.
In the second step, the non-linear part of the transformation is determined by using an analysis-by-synthesis approach.
Several views onto the real object are captured and compared with the corresponding synthetic renderings. Mutual information is
used as similarity metric.
Papers
| · | M. Scheuering, C- Rezk-Salama, H. Barfuss, A. Schneider, G. Greiner |
| Augmented Reality Based On Fast Deformable 2D-3D Registration For Image Guided Surgery |
| In in Proc. SPIE Medical Imaging, 2002 |
| [bib] [pdf]
|
| · | M. Scheuering, C. Rezk-Salama, H. Barfuß, K. Barth, A. Schneider, G. Greiner, G. Wessels, G.H. Feussner |
| Intra-operative Augmented Reality (AR) With Magnetic Navigation and Multi-Texture Based Volume Rendering for Minimally Invasive Surgery |
| In in Rechner- und Sensorgestützte Chirurgie, 2001 |
| [bib] [pdf]
|
