DARCOURT , Jacques

FDG-PET/CT (PET) is now considered the standard imaging tool for Hodgkin Lymphoma (HL) staging and restaging. However a CT-detected residual mass at the end of therapy (EoT) is still a challenge for PET interpretation. The aim of our study was to improve the overall accuracy of EoT PET/CT by using a dynamic dual-point scanning at 60 and 120...

In emission tomography, the process of image reconstruction has evolved since the utilization of the filtered back projection algorithm (FBP). Nowadays, iterative techniques incorporating statistical knowledge of the photon emission process has produced much interest among researchers, not only for the improvements achieved in image quality,...

PURPOSE: In single-photon emission computed tomography (SPECT) of the dopaminergic system, measurements of striatal uptake are useful for diagnosis and patient follow-up but are strongly biased by the partial volume effect (PVE). We studied whether PVE correction might improve patient classification based on binding potential (BP) measurements....

Les médecins ont besoin de données objectives et quantifiées pour les aider dans le diagnostic de certaines pathologies. L'analyse statistique des images médicales de populations de patients est un moyen de leur fournir ce type de données. Dans ce rapport nous étudions le logiciel SPM, son utilisation sur des images SPECT.

PET plays an increasingly important role in the management of brain tumors. This review outlines currently available PET radiotracers and their respective indications. It specifically focuses on 18F-FDG, amino acid and somatostatin receptor radiotracers, for imaging gliomas, meningiomas, primary central nervous system lymphomas as well as brain...

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This paper presents a new variational method for the segmentation of a moving object against a still background, over a sequence of (2-D or 3-D) image frames. The method is illustrated in application to myocardial gated SPECT data, and incorporates a level set framework to handle topological changes while providing closed boundaries.The key...

Objectifs.- La quantification des tumeurs par imagerie micro-TEMP dans la région abdominale est rendue difficile par le mouvement respiratoire. Les acquisitions synchronisées répondent à ce problème au détriment du rapport signal à bruit. L'objectif est de fournir une reconstruction sans mouvement respiratoire et avec un meilleur signal à bruit...

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International audience

The left ventricle myocardium and chamber segmentation in gated SPECT images is a challenging problem. Segmentation is however the first step to geometry reconstruction and quantitative measurements needed for clinical parameters extraction from the images. New algorithms for segmenting the heart left ventricle myocardium and chamber are...