1. A device for charged hadron therapy verification by detecting and/or quantifying prompt gammas produced when irradiating an object or a body with a charged hadron beam, said device comprising a gamma-ray pin-hole camera arranged to acquire the number of said prompt gammas emitted while the said charged hadron beam is penetrating the said object or body, wherein the pinhole camera comprises at least one scintillating crystal optically coupled to a plurality of photomultiplier tubes which form a linear or two-dimensional array.