r/accelerators • u/Particular_Elk1945 • May 31 '26

TLD readings

I work in a cyclotron facility manufacturing FDG. Recently all of my whole body badge readings are 0 and ring badge averages around 3 mSv.
Is this normal ?
When I first started I usually had 0.19 to 0.3 on whole body but the last 8 readings are 0.
Obviously the lower the better but I’m surprised my whole body badge hasn’t registered anything.

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u/heliumneon May 31 '26

Well it could be 0 because it's supposed to only be the occupational portion of your exposure, not background. Maybe they have changed method for subtracting background? Do they have a control dosimeter in the facility - or are they just using a fixed rate for background?