Fraunhofer-Institut für Produktionsanlagen und Konstruktionstechnik IPK

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  • Publication
    Quality evaluation of image recording strategies for limited angle tomography
    ( 2010)
    Stopp, F.
    ;
    Winne, C.
    ;
    Jank, E.
    ;
    Keeve, E.
    In this paper we propose a new method for evaluating image recording strategies for limited angle tomography. In limited angle tomography exact three-dimensional (3-D) reconstruction is not achievable. With this method a metric for the reachable reconstruction quality by defined X-ray source trajectories is calculated. The result of our method is independent of reconstruction algorithms. Our approach is based on the gradients of the scanned volume and their grade of determinability. Compared to simulated reconstruction accuracy with simultaneous algebraic reconstruction techniques, the method of evaluation shows the same dependencies on X-ray source trajectories. By using the proposed method different source trajectories for a limited angle range are comparable with respect to the reachabl e reconstruction quality.
  • Publication
    A new method for evaluation of x-ray imaging trajectories for limited angle tomography
    ( 2009)
    Stopp, F.
    ;
    Winne, C.
    ;
    Jank, E.
    ;
    Keeve, E.
    In this paper we propose a new method for evaluation of image recording strategies for limited angle tomography. In limited angle tomography exact 3D reconstruction is not achievable. With our method a metric for the reachable reconstruction quality is calculated. The result is independent of reconstruction algorithms and only depends on the image recording strategy. Our approach is based on the gradients of the scanned volume and their grade of determinability. Our simulation results show that the relative reconstruction accuracy is similar to the simultaneous algebraic reconstruction technique. By using our method different x-ray source trajectories for a predefined limited angle range are now comparable with respect to the reconstruction quality.