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Registration of a priori information for computed laminography

: Schorr, Christian; Dörr, Laura; Maisl, Michael; Schuster, Thomas

Postprint urn:nbn:de:0011-n-4268067 (874 KByte PDF)
MD5 Fingerprint: 8415c2d63f2726f59dbd85c3f3981e86
Created on: 01.03.2019

NDT & E International 86 (2017), pp.106-112
ISSN: 0963-8695
Deutsche Forschungsgemeinschaft DFG
MA 5836/1-1
Parallel Iterative Methods with A Priori Information for Robust Computed Laminography of Low Contrast, Difficult-To-Measure Objects
Journal Article, Electronic Publication
Fraunhofer IZFP ()
2D-3D registration; computed laminography; iterative reconstruction; a priori information

Reconstructed 3D volumes from computed laminography data suffer from blurring artefacts due to the laminographic geometry. Such losses in quality can be compensated for by integrating a priori information about the test object into the iterative reconstruction process. However, this requires the position of the a priori model to be fitted exactly to the measured data. A (semi-) automatic 2D-3D registration algorithm which only requires a minimal additional user input and is based on a mathematical optimization problem is presented. Using measurement data obtained by simulating X-ray projections of the laminographic scanner CLARA the algorithm is validated.