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VISUALIZATION
2005
IEEE

Rendering Tetrahedral Meshes with Higher-Order Attenuation Functions for Digital Radiograph Reconstruction

11 years 5 months ago
Rendering Tetrahedral Meshes with Higher-Order Attenuation Functions for Digital Radiograph Reconstruction
This paper presents a novel method for computing simulated x-ray images, or DRRs (digitally reconstructed radiographs), of tetrahedral meshes with higher-order attenuation functions. DRRs are commonly used in computer assisted surgery (CAS), with the attenuation function consisting of a voxelized CT study, which is viewed from different directions. Our application of DRRs is in intra-operative “2D-3D” registration, i.e., finding the pose of the CT dataset given a small number of patient radiographs. We register 2D patient images with a statistical tetrahedral model, which encodes the CT intensity numbers as Bernstein polynomials, and includes knowledge about typical shape variation modes. The unstructured grid is more suitable for applying deformations than a rectilinear grid, and the higher-order polynomials provide a better approximation of the actual density than constant or linear models. The intra-operative environment demands a fast method for creating the DRRs, which we pr...
Ofri Sadowsky, Jonathan D. Cohen, Russell H. Taylo
Added 25 Jun 2010
Updated 25 Jun 2010
Type Conference
Year 2005
Where VISUALIZATION
Authors Ofri Sadowsky, Jonathan D. Cohen, Russell H. Taylor
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