Three-dimensional maps of the tomographic incompleteness of cone-beam CT scanner geometries

Matthieu Laurendeau (1, 2, 3) , Laurent Desbat (1) , Guillaume Bernard (2) , Frédéric Jolivet (2) , Sébastien Gorges (2) , Fanny Morin (2) , Simon Rit (3)

1 TIMC-GMCAO - Gestes Medico-chirurgicaux Assistés par Ordinateur
2 Thales AVS France SAS
3 Imagerie Tomographique et Radiothérapie

New generations of X-ray sources based on carbon nanotubes (CNT) enable the design of multi-sources computed tomography (CT) scanners. CT scanners with CNT often use a limited number of stationary sources and corresponding projections. Threedimensional CT theory evaluates whether a given continuous source trajectory provides sufficient data for stable reconstruction of an imaged object. This paper extends a local incompleteness metric to derive a three-dimensional map and quantify tomographic incompleteness for a finite set of sources. We illustrate this incompleteness with a dedicated phantom. The reconstructed CT images of the phantom match the results predicted by the incompleteness map.

Domains: Medical Imaging

Matthieu Laurendeau, Laurent Desbat, Guillaume Bernard, Frédéric Jolivet, Sébastien Gorges, et al.. Three-dimensional maps of the tomographic incompleteness of cone-beam CT scanner geometries. Fully 3D Image Reconstruction in Radiology and Nuclear Medicine, Jul 2023, Stony Brook, United States. pp.223-226. ⟨hal-04281917⟩