Investigation on reconstruction methods applied to 3D terahertz computed tomography

Benoît Recur (1) , A. Younus (2) , S. Salort (3) , Patrick Mounaix (2) , B. Chassagne (3) , P. Desbarats (1) , J.-P. Caumes (4) , Emmanuel Abraham (2)

1 LaBRI - Laboratoire Bordelais de Recherche en Informatique
2 LOMA - Laboratoire Ondes et Matière d'Aquitaine
3 ALPhANOV
4 SPAM - Service des Photons, Atomes et Molécules

3D terahertz computed tomography has been performed using a monochromatic millimeter wave imaging system coupled with an infrared temperature sensor. Three different reconstruction methods (standard back-projection algorithm and two iterative analysis) have been compared in order to reconstruct large size 3D objects. The quality (intensity, contrast and geometric preservation) of reconstructed cross-sectional images has been discussed together with the optimization of the number of projections. Final demonstration to real-life 3D objects has been processed to illustrate the potential of the reconstruction methods for applied terahertz tomography.

Domaines: Imagerie médicale; Optique [physics.optics]

Benoît Recur, A. Younus, S. Salort, Patrick Mounaix, B. Chassagne, et al.. Investigation on reconstruction methods applied to 3D terahertz computed tomography. Optics Express, 2011, 19 (6), pp.5105-5117. ⟨10.1364/OE.19.005105⟩. ⟨hal-00577605⟩