Experimental proof-of-concept and first field tests of the dual gamma-neutron imager GN-Vision

Instituto de Física Corpuscular, CSIC-Universitat de València, Spain

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Published online: 18 November 2025

Abstract

GN-Vision is a compact dual-modality imaging system designed to simultaneously localize the spatial origin of γ-ray and slow neutron sources, with promising applications in hadron therapy, particularly Boron Neutron Capture Therapy (BNCT). This contribution presents results from the first experimental neutron imaging campaign using an early prototype of GN-Vision, conducted at the Institut Laue-Langevin (ILL) with a thermal neutron beam. The primary objective was to validate the system’s neutron imaging capabilities. Additionally, we investigated thermal neutron absorption in water phantoms containing ¹⁰B, with experimental results benchmarked against GEANT4 simulations. The second part of the work reports on recent advancements towards the development of a full GN-Vision demonstrator. In particular, we present the characterization of the spatial and energy response of a CLLBC scintillator to both neutrons and γ -rays using the compact and scalable PETsys electronics. The promising results highlight the potential of CLLBC to enable integrated neutron and gamma imaging in the first complete GN-Vision prototype.