Measurement of the residual radioactivity induced in the front foil of a target assembly in a modern medical cyclotron.
The levels of residual radioactivity induced in Havar foils at the entrance of a high-pressure 18O-enriched water target used for the production of 18F- in a medical cyclotron with 16 MeV protons have been determined using high-resolution gamma-ray spectrometry. Whole body and skin dose rates arising from exposure to these foils during their periodic replacement have been estimated. The results indicate that irradiated foils do not represent a significant radiological hazard for the cyclotron operating staff and that no waste disposal difficulties should be encountered after an appropriate 'cooling' period of 2 years.
Molecular Imaging Institute (M2i), Blackrock Clinic, Blackrock, Co. Dublin, Ireland. ruairiodonnell@eircom.net
R G
RG
O'Donnell
L
L
León Vintró
G J
GJ
Duffy
P I
PI
Mitchell
D001822:Body Burden; D003198:Computer Simulation; D017357:Cyclotrons; D004864:Equipment and Supplies / Q000009:adverse effects; D005462:Fluorine Radioisotopes / Q000009:adverse effects / Q000032:analysis*; D006282:Health Personnel; D006801:Humans; D007553:Isotope Labeling / Q000009:adverse effects / Q000379:methods*; D008954:Models, Biological; D016273:Occupational Exposure / Q000032:analysis*; D011829:Radiation Dosage; D011832:Radiation Injuries / Q000517:prevention & control; D011835:Radiation Protection / Q000379:methods*; D011850:Radioactive Waste / Q000009:adverse effects / Q000032:analysis*; D011874:Radiometry / Q000379:methods*; D019275:Radiopharmaceuticals / Q000009:adverse effects / Q000032:analysis*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D012879:Skin Physiological Phenomena; D014915:Whole-Body Counting / Q000379:methods
D005462:Fluorine Radioisotopes; D011850:Radioactive Waste; D019275:Radiopharmaceuticals