title: Propagation beam consideration for 3D THz computed tomography.
abstract: In this paper, a model of the beam propagation is developed according to the physical properties of THz waves used in THz computed tomography (CT) scan imaging. This model is first included in an acquisition simulator to observe and estimate the impact of the Gaussian beam intensity profile on the projection sets. Second, the model is introduced in several inversion methods as a convolution filter to perform efficient tomographic reconstructions of simulated and real acquired objects. Results obtained with three reconstruction methods (BFP, SART and OSEM) are compared to the techniques proposed in this paper. We will demonstrate an increase of the overall quality and accuracy of the 3D reconstructions.
authors.affiliation: LaBRI, Bordeaux 1 University, CNRS UMR 5800, 351 cours de la Liberation, 33405 Talence, France. brecur@labri.fr
authors.forename: B
authors.initials: B
authors.lastname: Recur
authors.forename: J P
authors.initials: JP
authors.lastname: Guillet
authors.forename: I
authors.initials: I
authors.lastname: Manek-Hönninger
authors.forename: J C
authors.initials: JC
authors.lastname: Delagnes
authors.forename: W
authors.initials: W
authors.lastname: Benharbone
authors.forename: P
authors.initials: P
authors.lastname: Desbarats
authors.forename: J P
authors.initials: JP
authors.lastname: Domenger
authors.forename: L
authors.initials: L
authors.lastname: Canioni
authors.forename: P
authors.initials: P
authors.lastname: Mounaix
mesh_terms: D000465:Algorithms; D003198:Computer Simulation; D054893:Cone-Beam Computed Tomography / Q000379:methods*; D007089:Image Enhancement / Q000379:methods; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D021621:Imaging, Three-Dimensional / Q000379:methods*; D015233:Models, Statistical; D015203:Reproducibility of Results; D012542:Scattering, Radiation; D012680:Sensitivity and Specificity; D055053:Terahertz Radiation