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Three-dimensional reconstruction of high contrast objects using C-arm image intensifier projection data

1999; Elsevier BV; Volume: 23; Issue: 6 Linguagem: Inglês

10.1016/s0895-6111(99)00028-2

1879-0771

M. Graß, R. Koppe, E. Klotz, Roland Proksa, Michael Kühn, Hugo J.W.L. Aerts, John Op de Beek, Richard Kemkers,

Advanced X-ray and CT Imaging

The reconstruction of three-dimensional (3D) objects from 2D X-ray cone-beam projections using a circular source path is most commonly done with an algorithm according to Feldkamp et al. [Feldkamp LA, Davis LC, Kress JW. Practical cone-beam algorithms. J Opt Soc Am A 1984;6:612-619]. An adaptation of this so-called Feldkamp method to cone-beam projections acquired with a C-arm system is presented here. In a phantom study, reconstruction results obtained along real source-detector trajectories of a C-arm system are compared to reconstruction results obtained from projections acquired from a full-circular trajectory and from one consisting of two full orthogonal circles, which fulfills Tuy's sufficiency condition. The straightforward application of Feldkamp's method adapted to projection data obtained with a C-arm system illustrates the 3D imaging potential of image intensifier based cone-beam computed tomography. Reconstruction results from projection data of different patients acquired with a motorized C-arm system such as vessel structures filled with contrast agent and bones are presented.