Theoretically exact reconstruction for cone beam artifact-free CT imaging
A large aperture angle of the cone beam enables fast CT acquisition by exploiting a high share of the available tube power. However, cone beam artifacts increase with growing aperture angles when using conventional reconstruction techniques.
Complete scan trajectories (helix, circle+line, circle+arc)
The CERA-TXR algorithm overcomes this cone-beam angle limitation by theoretical exact reconstruction of complete scan trajectories, which fully sample the Radon space. Helical, circle-plus-line, and circle-plus-arc scan trajectories are supported for this end.
Variable-focus planar scan trajectories
Furthermore, the CERA-TXR algorithm supports planar trajectories in which the object-to-source and object-to-detector distances change continuously from projection to projection. Hence, elliptical trajectories can be reconstructed, for instance. Though, be aware that cone-beam artifact free images are only possible with a fully sampled Radon space.
Key advantages of CERA-TXR
- Excellent and cone-beam artifact free images with complete scan trajectories
- High scan speed by supporting a high helix pitch (e.g. whole detector can be used in helix)
- Efficient scan of very long objects without image stitching
- A large cone-beam angle better utilizes the tube power and thus supports high scan speeds
- A large cone-beam angle helps to realize compact CT systems