Radiation exposure from FDG PET patients with multiple same day appointments

TL;DRAbstract

592 Objectives Investigate radiation exposure to staff and public from patients leaving the PET facility for other clinic areas. Methods 20 patients with same day appointments after PET were surveyed to determine time spent in various areas as well as for the number and age of accompanying people. 28.7% of patients at our institution have same day appointments with their physiicans and 34% have multiple appointments. Exposure rates were calculated at various distances and time from injection using the accepted dose rate constant to determine potential exposure to others. Survey meter measurements on some patients was used to determine exposure variation as a function of distance. Results 555 MBq FDG at 0.5m for 1 hr begining 95 min postinjection resulted in 0.08 mGy calculated air kerma. Measured results were less,see Table. Patients were frequently in close contact with others for prolonged periods. Waiting rooms with chairs Conclusions Interpreting exposure measurements at ≤1m is cha

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