Where do you wear the dosimeter?

• A. On the chest at the sternum only
• B. On the wrist
• C. Front of body, between neck and waist, no more than a hand width apart with both SRD & DLR facing from body
• D. Attached to the helmet

Answer: (C)

Place the dosimeter on the front of the body, at chest level between the neck and waist, as close to the body as practical (no more than a hand’s width away). This position best represents the radiation dose the person is exposed to because most external exposure comes from in front of the wearer and around the torso. Keeping it close to the body and oriented outward (so the detectors face away from you) prevents shielding by clothing or the body from affecting the reading and ensures the detectors receive the incident radiation properly. Wearing it on the wrist or helmet measures only localized exposure and can be easily shielded or misread, so those placements don’t provide an accurate picture of whole-body dose.