Where should the dosimetry badge be worn when using a lead apron?

• A. Attached to scrubs behind the lead apron
• B. On the outside of the apron
• C. On the collar outside the lead apron
• D. In the pocket underneath the apron

Answer: (A)

The main idea is that a dosimetry badge should be placed to measure the actual radiation dose reaching the body when shielding is used. With a lead apron in place, most direct exposure to the torso is blocked, but some radiation may still penetrate or scatter toward the body. Attaching the badge to the scrubs behind the lead apron places it on the body side of the shield, so it records the dose that makes it through the apron and reaches tissues. This gives a realistic measure of the body’s exposure despite shielding.

Wearing the badge on the outside of the apron would capture unattenuated exposure and could misrepresent the dose actually reaching internal tissues. Placing it elsewhere, like in a pocket or on the collar outside, either isn’t practical or doesn’t reflect the torso dose the apron is meant to protect. Often facilities use an additional badge at the collar to monitor head/neck exposure, but for assesssing shielded body dose, behind the apron is the appropriate spot.