First in-beam PET measurement of β⁺ radioactivity induced by hard photon beams

In this article we present the first experimental results of in-beam PET measurements during high energy photon phantom irradiation. An inhomogeneous phantom was irradiated with pulsed 34 MV bremsstrahlung. The measurements have been conducted with a dedicated double head photon camera. A high material contrast could be achieved and furthermore production rates of C-11 and O-15 were derived from the time dependent activity.