title: Object Specific Trajectory Optimization for Industrial X-ray Computed Tomography.
abstract: In industrial settings, X-ray computed tomography scans are a common tool for inspection of objects. Often the object can not be imaged using standard circular or helical trajectories because of constraints in space or time. Compared to medical applications the variance in size and materials is much larger. Adapting the acquisition trajectory to the object is beneficial and sometimes inevitable. There are currently no sophisticated methods for this adoption. Typically the operator places the object according to his best knowledge. We propose a detectability index based optimization algorithm which determines the scan trajectory on the basis of a CAD-model of the object. The detectability index is computed solely from simulated projections for multiple user defined features. By adapting the features the algorithm is adapted to different imaging tasks. Performance of simulated and measured data was qualitatively and quantitatively assessed.The results illustrate that our algorithm not only allows more accurate detection of features, but also delivers images with high overall quality in comparison to standard trajectory reconstructions. This work enables to reduce the number of projections and in consequence scan time by introducing an optimization algorithm to compose an object specific trajectory.
authors.affiliation: Siemens AG, Corporate Technology, 81730 Munich, Germany.|Computer Aided Medical Procedures (CAMP), Technische Universität München, 85748 Garching, Germany.|Department of Radiology, Technische Universität München, 81675 Munich, Germany.
authors.forename: Andreas
authors.initials: A
authors.lastname: Fischer
authors.affiliation: Computer Aided Medical Procedures (CAMP), Technische Universität München, 85748 Garching, Germany.
authors.forename: Tobias
authors.initials: T
authors.lastname: Lasser
authors.affiliation: Siemens AG, Corporate Technology, 81730 Munich, Germany.
authors.forename: Michael
authors.initials: M
authors.lastname: Schrapp
authors.affiliation: Siemens AG, Corporate Technology, 81730 Munich, Germany.
authors.forename: Jürgen
authors.initials: J
authors.lastname: Stephan
authors.affiliation: Department of Radiology, Technische Universität München, 81675 Munich, Germany.|Chair for Biomedical Physics and Institute for Medical Engineering, Technische Universität München, 85748 Garching, Germany.
authors.forename: Peter B
authors.initials: PB
authors.lastname: Noël
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