Euromedim 2006 :1st European Conference on Molecular Imaging Technology

Nuclear medical imaging using beta+ gamma coincidences from 44Sc radio-nuclide with liquid xenon as detection medium

11 May 2006, 18:00

15m

Palais du Pharo, Marseille

oral S8 Multimodalities Advances in imaging Technology

Speaker

Mr Cyril Grignon (Subatech, EMN-IN2P3/CNRS-Universite)

Description

We report on a new imaging technique based on the measurement of the emitter location in the three dimensions with a few mm spatial precision using beta+ gamma emitters. Such coincidences arise from a new kind of radio-nuclides, potentially produced at the ARRONAX cyclotron of Nantes, which emits a gamma-ray quasi simultaneously with the beta+ decay. The principle is to reconstruct the intersection of the classical line of response (obtained with a classical PET-camera) with the third gamma-ray. The emission angle measurement of this additional gamma-ray involves the use of a Compton telescope for which a new generation of camera based on a liquid xenon time projection chamber is considered. Geant4 simulations of such a large acceptance liquid xenon Compton telescope camera combined with a commercial microPET (LSO crystals) have been performed and the obtained results will be presented. It demonstrates that a direct location of the 44Sc emitter with 2.5 mm spatial resolution in the 3 dimensions is achievable in counting mode.