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reconstructed image  
Reconstructed image of the skeleton of a rat injected with F-18, as obtained by the AX-PET prototype.


G. Dissertori and F. Pauss


Active R&D project


Recent years have seen a significant progress in PET (Positron Emission Tomography) instrumentation, boosted by the migration of technologies originally developed for high energy physics experiments into prototype PET devices.

The AX-PET (Axial PET) project is an excellent example in this direction, showing how calorimetry knowledge could be applied for high resolution PET detectors. AX-PET started in 2007 with the goal of constructing a demonstrator for a PET scanner based on the unconventional axial geometry. It uses modules of axially-oriented long LYSO crystals, interleaved by arrays of WLS strips, all read out by Geiger-mode avalanche photodiodes (G-APD). This novel configuration allows a 3-dimensional reconstruction of the gamma interaction point as well as full identification of Compton interactions in the crystals, that can be included in image reconstruction, thus enhancing the sensitivity.

One AX-PET detector module with a mouse phantom mounted in front of it.
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Thu Jul 20 10:58:39 CEST 2017
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