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Validation de la simulation Monte-Carlo de la gamma-caméra petit animal Biospace sur la grille de calcul légère CiGri. Application à l'évaluation de l'algorithme de l'inversion analytique de la transformée de Radon atténuée

Joe Aoun 1
1 GMCAO
LPC - Laboratoire de Physique Corpusculaire - Clermont-Ferrand, TIMC - Techniques de l'Ingénierie Médicale et de la Complexité - Informatique, Mathématiques et Applications, Grenoble - UMR 5525
Abstract : Monte Carlo Simulation MCS is nowadays a powerful approach to nuclear medical imaging for detector design and optimization, reconstruction method evaluation and physical effect modelling. Degradations due to attenuation and scattering can be then compensated for in order to improve image reconstruction. The major drawback of MCS is huge computation time. During this PhD work, we have benefited from the GATE MCS (Geant4 Application for Tomographic Emission) for SPECT/PET modelling and from the lightweight grid CiGri (CIMENT GRID) to reduce the elapsed computing time. Our first goal is the modelling of the Biospace small animal gamma camera with GATE. The gamma camera model is validated by a confrontation of the data generated by the model to data obtained experimentally on the true camera. The real data acquired on the camera are accurately predicted by the MCS. The model of the camera is then used to evaluate the performance of the Novikov-Natterer analytic inversion of the attenuated Radon transform. We show that the Novikov-Natterer method improves qualitatively but also quantitatively, the reconstruction compared to the classical FBP analytical algorithm.
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https://tel.archives-ouvertes.fr/tel-00462290
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Submitted on : Tuesday, March 9, 2010 - 10:19:03 AM
Last modification on : Thursday, November 19, 2020 - 3:56:09 PM
Long-term archiving on: : Friday, June 18, 2010 - 10:33:03 PM

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  • HAL Id : tel-00462290, version 1

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Joe Aoun. Validation de la simulation Monte-Carlo de la gamma-caméra petit animal Biospace sur la grille de calcul légère CiGri. Application à l'évaluation de l'algorithme de l'inversion analytique de la transformée de Radon atténuée. Physique des Hautes Energies - Expérience [hep-ex]. Université Blaise Pascal - Clermont-Ferrand II, 2009. Français. ⟨tel-00462290⟩

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