Speaker: M. Colombo,University of Milano Bicoca

Abstract:

The Multiple Emission Tomography (MET) detector is a PET-based system featuring depth-of-interaction (DOI) capability and light-sharing readout. It has demonstrated excellent performance in energy, timing, and DOI resolution. Beyond its PET functionality, the MET detector can identify inter-crystal scattering events and simultaneously operate as a single-layer Compton camera.

This dual-mode capability enables routine imaging of high-energy gamma photons—beyond the typical range of conventional SPECT—while preserving high sensitivity and spatial resolution. Simulations with realistic detector configurations show that MET achieves spatial resolution comparable to that of SPECT with medium-energy collimators, particularly at higher photon energies, but with significantly greater detection efficiency.

These results highlight the strong potential of MET for high-energy single-photon imaging applications, such as theranostics, where precise dose verification is crucial for radionuclides emitting high-energy gamma rays.