It's important to wear your dosimeter in the correct location, and each time you use or are around radiation sources. Below are the recommended locations to wear your dosimeter
Torso (TR) or Whole Body (WB)
Without a lead apron: anywhere between the collar and waist (within the dotted lines on the visual).
With a lead apron: anywhere between the collar and waist, underneath the lead apron.
Collar
Without a lead apron: on either side of the collar
With lead apron: on the outside of the apron, on either side of the collar
Fetal
Without lead apron: at the waistline
With lead apron: at the waistline, underneath the lead apron
If you normally are assigned a dosimeter, wear the regular dosimeter like normal.
Ring
A ring dosimeter should be worn on your dominant hand, that is directly manipulating or closest to the radiation source.
The label on the ring dosimeter should be facing the radiation source so it is visible on the inside of the hand (i.e. palm side).