Publications Repository - Helmholtz-Zentrum Dresden-Rossendorf
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Ultrafast X-ray Computed Tomography with a Linearly Scanned Electron Beam SourceHampel, U.; Speck, M.; Koch, D.; Menz, H.-J.; Mayer, H.-G.; Fietz, J.; Hoppe, D.; Schleicher, E.; Zippe, C.; Prasser, H.-M.
We devised and tested a novel computed tomography approach that utilises a scanned electron beam X-ray source to produce fast sequences of tomographic images of transient density distributions. In contrary to classical electron beam tomography we used a linear deflection pattern for the electron beam and a non-annular detector arc to record transmission data of an object from different projection angles. This approach gives the highest achievable axial resolution and is comparatively moderate in effort and costs. For the inverse problem we applied iterative image reconstruction techniques to reconstruct the density distribution from a limited data set. The method has been experimentally tested on static and dynamic phantoms with a frame rate of 1000 images per second and a spatial resolution of approximately 1 mm in plane and axial.
Keywords: high-speed X-ray computed tomography, limited angle reconstruction
- Flow Measurement and Instrumentation 16 (2005), 65-72
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