Abstract
A Compton camera prototype for a position-sensitive detection of prompt gamma rays from proton-induced nuclear reactions is being developed in Garching. The detector system allows to track the Compton-scattered electrons. The camera consists of a monolithic LaBr3:Ce scintillation absorber crystal, read out by a multi-anode PMT, preceded by a stacked array of 6 double-sided silicon strip detectors acting as scatterers. The LaBr3:Ce crystal has been characterized with radioactive sources. Online commissioning measurements were performed with a pulsed deuteron beam at the Garching Tandem accelerator and with a clinical proton beam at the OncoRay facility in Dresden. The determination of the interaction point of the photons in the monolithic crystal was investigated.
Highlights
A Compton camera prototype for prompt gamma medical imagingP.G. Thirolf1, S. Aldawood1,2, M. Bohmer3, J. Bortfeldt1, I. Castelhano1,4, G. Dedes1, F. Fiedler6, R. Gernhauser3, C. Golnik5, S. Helmbrecht6, F. Hueso-Gonzalez6, H. v.d. Kolff1,7, T. Kormoll5, C. Lang1, S. Liprandi1, R. Lutter1, T. Marinsek1, L. Maier3, G. Pausch5, J. Petzoldt5, K. Romer6, D. Schaart7 and K. Parodi1
In order to be able to fully exploit the beneficial properties of tumour treatment by particle beams, provided by the highly conformal dose deposition within the Bragg peak, precise knowledge of the ion beam stopping range is mandatory
The Compton camera prototype, presently being under commissioning in Garching, is composed of a scatterer/tracker array consisting of 6 doublesided silicon strip detectors (DSSSD, area: 50×50 mm2, thickness: 0.5 mm, 128 strips/side) and a monolithic LaBr3:Ce scintillation absorber crystal (50×50×30 mm3), read out by a multi-anode PMT (Hamamatsu H9500, 16×16 segments with 3×3 mm2 pixel size)
Summary
P.G. Thirolf1, S. Aldawood1,2, M. Bohmer3, J. Bortfeldt1, I. Castelhano1,4, G. Dedes1, F. Fiedler6, R. Gernhauser3, C. Golnik5, S. Helmbrecht6, F. Hueso-Gonzalez6, H. v.d. Kolff1,7, T. Kormoll5, C. Lang1, S. Liprandi1, R. Lutter1, T. Marinsek1, L. Maier3, G. Pausch5, J. Petzoldt5, K. Romer6, D. Schaart7 and K. Parodi1
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