Spectral CT reconstruction with an explicit photon-counting detector model: a " one-step " approach

Pierre-Antoine Rodesch 1 V. Rebuffel 1 C. Fournier 1 Florence Forbes 2 L. Verger 1
1 CEA-LETI - Laboratoire d'Electronique et des Technologies de l'Information
2 MISTIS - Modelling and Inference of Complex and Structured Stochastic Systems
Inria Grenoble - Rhône-Alpes, LJK - Laboratoire Jean Kuntzmann, INPG - Institut National Polytechnique de Grenoble
Abstract : Recent developments in energy-discriminating Photon-Counting Detector (PCD) enable new horizons for spectral CT. With PCDs, new reconstruction methods take advantage of the spectral information measured through energy measurement bins. However PCDs have serious spectral distortion issues due to charge-sharing, fluorescence escape, pileup effect… Spectral CT with PCDs can be decomposed into two problems: a noisy geometric inversion problem (as in standard CT) and an additional PCD spectral degradation problem. The aim of the present study is to introduce a reconstruction method which solves both problems simultaneously: a " one-step " approach. An explicit linear detector model is used and characterized by a Detector Response Matrix (DRM). The algorithm reconstructs two basis material maps from energy-window transmission data. The results prove that the simultaneous inversion of both problems is well performed for simulation data. For comparison, we also perform a standard " two-step " approach: an advanced polynomial decomposition of measured sinograms combined with a filtered-back projection reconstruction. The results demonstrate the potential uses of this method for medical imaging or for non-destructive control in industry.
Type de document :
Communication dans un congrès
SPIE Medical Imaging , Feb 2018, Houston, United States
Liste complète des métadonnées

Littérature citée [7 références]  Voir  Masquer  Télécharger
https://hal.inria.fr/hal-01652017
Contributeur : Florence Forbes <>
Soumis le : mercredi 29 novembre 2017 - 18:27:44
Dernière modification le : mercredi 11 avril 2018 - 01:58:21

Fichier

RODESCH_SPIE_MI18_summary_CEAG...
Fichiers produits par l'(les) auteur(s)

Identifiants

  • HAL Id : hal-01652017, version 1

Collections

CEA | LJK | DRT | INRIA | INSMI | UGA | LJK_PS | LJK_PS_MISTIS | LETI

Citation

Pierre-Antoine Rodesch, V. Rebuffel, C. Fournier, Florence Forbes, L. Verger. Spectral CT reconstruction with an explicit photon-counting detector model: a " one-step " approach. SPIE Medical Imaging , Feb 2018, Houston, United States. 〈hal-01652017〉

Exporter

BibTeX TEI DC DCterms EndNote

Partager

Métriques

Consultations de la notice

436

Téléchargements de fichiers

107

Contact


archive-ouverte@inria.fr