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ST: Fachverband Strahlen- und Medizinphysik

ST 6: Radiation Therapy

ST 6.5: Vortrag

Mittwoch, 3. April 2019, 16:15–16:30, H48

First test results with a PETSys-based setup for highly segmented Prompt Gamma detection. — •Oliver Köchel¹, Olga Novgorodova¹, Rainer Hentges¹, Andreas Glatte¹, Benjamin Lutz², Katja Römer², Guntram Pausch², and Arno Straessner¹ — ¹IKTP, TU Dresden — ²HZDR, Dresden

Radiation therapy requires controlling range and dose during treatments. Therefore, in vivo dosimetry is very attractive and has seen many approaches and developments in recent years, with prompt gamma ray detection being one of them. Prompt gamma rays exhibit emission energies of 2-8 MeV. A small prototype for a prompt-gamma detector was developed based on a highly segmented 4x4 scintillator matrix with 6mmx6mm BGO crystals read out by a SiPM array. Based on the experience with BGO crystals, new detectors made of CeBr3 and GAGG(Ce) crystals were assembled with a SiPM array and tested with a TOFPET2 kit developed by PETSys electronics. The kit originally aims at PET applications and allows measurements of energy and arrival time of photons. We present first assembly experience, optimization procedures and laboratory tests based on measurements with radioactive sources.