Model-based respiratory motion compensation for emission tomography image reconstruction

Abstract : In emission tomography imaging, respiratory motion causes artifacts in lungs and cardiac reconstructed images, which lead to misinterpretations, imprecise diagnosis, impairing of fusion with other modalities, etc. Solutions like respiratory gating, correlated dynamic PET techniques, list-mode data based techniques and others have been tested, which lead to improvements over the spatial activity distribution in lungs lesions, but which have the disadvantages of requiring additional instrumentation or the need of discarding part of the projection data used for reconstruction. The objective of this study is to incorporate respiratory motion compensation directly into the image reconstruction process, without any additional acquisition protocol consideration. To this end, we propose an extension to the maximum likelihood expectation maximization (MLEM) algorithm that includes a respiratory motion model, which takes into account the displacements and volume deformations produced by the respiratory motion during the data acquisition process. We present results from synthetic simulations incorporating real respiratory motion as well as from phantom and patient data.
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https://hal.inria.fr/inria-00616030
Contributeur : Project-Team Asclepios <>
Soumis le : vendredi 19 août 2011 - 18:40:23
Dernière modification le : mercredi 19 septembre 2018 - 01:15:56

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  • HAL Id : inria-00616030, version 1

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Mauricio Reyes Aguirre, Grégoire Malandain, Pierre Malick Koulibaly, Miguel Ángel González Ballester, Jacques Darcourt. Model-based respiratory motion compensation for emission tomography image reconstruction. Phys Med Biol, undefined or unknown publisher, 2007, 52 (12), pp.3579-600. 〈inria-00616030〉

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