Berlin 2005 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
HK: Physik der Hadronen und Kerne
HK 42: Instrumentation und Anwendungen
HK 42.3: Vortrag
Mittwoch, 9. März 2005, 14:45–15:00, TU MA042
The feasibility of in-beam PET for therapeutic beams of 3He — •F. Fiedler, K. Parodi und W. Enghardt — Forschungszentrum Rossendorf e. V., Postfach 51 01 19, D-01314 Dresden
At the clinical heavy ion treatment facility, which is under construction in Heidelberg, beams of He will be used for tumor irradiation. These will be monitored by means of in-beam PET for quality assurance. This requires a precise knowledge of the spatial distribution of beam induced positron emitters in the irradiated volume. For this an experiment at the Gesellschaft für Schwerionenforschung (GSI) with three mono-energetic 3He-beams of 130.03 AMeV to 207.92 AMeV and mean intensities varying from 2.0 · 108 to 3.5 · 108 ions/s has been carried out. The beams were stopped in homogeneous thick targets consisting of lucite, graphite and gelatine, which were placed in the center of the field of view of the PET-scanner at the experimental carbon ion therapy at GSI [1]. Results on the production rate and the spatial distribution of 3He ion induced β+-activity will be presented. From these, the accuracy and resolution for determining the range of the 3He primary beams is deduced. Furthermore, energy dependent cross sections for different reaction channels leading to positron emitters will be estimated from the experimental data.
[1] W. Enghardt et al., Nucl. Instr. Meth A 525 (2004) 284-288