ABSTRACT
A water-cooled XY-type beam current monitor was designed, manufactured and assembled in a cyclotron accelerator beam transport line. Tests were performed, demonstrating that apparatus is an instrument of great assistance in proton beam position. The XY-type beam current monitor has been widely used in liquid target irradiations, employing irradiation system which were originally designed for irradiations on 18 MeV cyclotron accelerator (Cyclone 18, IBA) only, however, with this apparatus, the target may be exchanged between the 30 MeV (Cyclone 30, IBA) and 18 MeV cyclotrons.
Subject(s)
Cyclotrons , RadioactivityABSTRACT
Few places in the world produce iodine-125. In Brazil, the first production was achieved by using the IEA-R1 nuclear reactor located at Nuclear and Energy Research Institute - IPEN. To verify the quality of iodine-125 produced, and the amount of contaminants such as iodine-126, cesium-134 and caesium-137 among others, iodine-125 samples were immobilized into epoxy matrix disc, with the same geometry of a barium-133 reference radioactive source, used to calibrate an HPGe detector. The HPGe detector has a thin carbon composite window, which allows measure the iodine-125 photopeaks, between 27.1 and 35.4 keV. The method employed here was successful in producing and measurement of iodine-125.
ABSTRACT
The [(18)F]FDG has 109.7 min half-life, there is a period about 6 h between the beginning of [(18)O]H2O irradiation until the PET-CT exam. Any fail in production chain will result in delay to the PET-CT exam. The absence of the position signs from [(18)O]H2O target valve may result in (18)F production loss. Three types of position sensors were tested. After finding the fitter sensor it was possible to reduce the incidence of fails, increasing the reliability in [(18)F]FDG production chain.
