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Communication Dans Un Congrès Année : 2022

Cone-beam reconstruction for a circular trajectory with transversely-truncated projections based on the virtual fan-beam method

Résumé

We describe a new procedure for three-dimensional (3D) region-of-interest (ROI) reconstruction from transverselytruncated cone-beam projections acquired with a circular source trajectory. This method is an extension to 3D of the virtual fan-beam (VFB) method. It is based on a VFB formula that performs the backprojection in the acquisition geometry. Our simulation results show that the ROI reconstruction of the 3D Shepp-Logan phantom is very similar to the one obtained by the Feldkamp, Davis, Kress (FDK) algorithm without truncation. However the reconstruction of the Forbild head phantom shows artefacts which are absent from the FDK truncation-free reconstruction.
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Dates et versions

hal-03821853 , version 1 (19-10-2022)

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Mathurin Charles, Rolf Clackdoyle, Simon Rit. Cone-beam reconstruction for a circular trajectory with transversely-truncated projections based on the virtual fan-beam method. 7th International Conference on Image Formation in X-Ray Computed Tomography 2022, Jun 2022, Baltimore, United States. pp.38, ⟨10.1117/12.2646482⟩. ⟨hal-03821853⟩
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