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Entwicklung eines schnellen Rekonstruktionsverfahrens für die 3D-Röntgen-Computertomografie
In order to detect in the range of several µm in materials and components the application of nondestructivetesting methods with a high spatial resolution is required. One method to inspect the whole volume, 3D X-Ray Computer Tomography (3D-CT), is presented in this contribution. Besides the principles of 3D-CT, the set-up of our system we will mainly focus in this paper to the development of a new efficient 3D reconstruction algorithm for cone beam profections which is based on the well known Feldkamp algorithm. The main difference between our algorithm and the Feldkamp algorithm is that the volume of the object under inspection is reconstructed in cylinder coordinates versus cartesian coordinates in the Feldkamp algorithm. The new algorithm is up to five times faster than the Feldkamp algorithm preserving the image quality. We will explain the principle of the new algorithm and present some results of applications which will demonstrate the advantage of our 3D-CT system withthe new 3 D reconstruction algorithm.