title: Three-dimensional reconstruction of high contrast objects using C-arm image intensifier projection data.
abstract: 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.
authors.affiliation: Philips Research Laboratories, Division Technical Systems, Hamburg, Germany. m.grass@pfh.research.philips.com
authors.forename: M
authors.initials: M
authors.lastname: Grass
authors.forename: R
authors.initials: R
authors.lastname: Koppe
authors.forename: E
authors.initials: E
authors.lastname: Klotz
authors.forename: R
authors.initials: R
authors.lastname: Proksa
authors.forename: M H
authors.initials: MH
authors.lastname: Kuhn
authors.forename: H
authors.initials: H
authors.lastname: Aerts
authors.forename: J
authors.initials: J
authors.lastname: Op de Beek
authors.forename: R
authors.initials: R
authors.lastname: Kemkers
mesh_terms: D000465:Algorithms; D000792:Angiography / Q000379:methods; D002536:Cerebral Arteries / Q000000981:diagnostic imaging*; D002574:Cervical Vertebrae / Q000000981:diagnostic imaging*; D003198:Computer Simulation; D003287:Contrast Media; D004551:Elbow Joint / Q000000981:diagnostic imaging*; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods*; D008953:Models, Anatomic; D019047:Phantoms, Imaging; D012399:Rotation; D014057:Tomography, X-Ray Computed / Q000379:methods
chemical_list: D003287:Contrast Media