Which statement about the Collar Dosimeter is true?

Which statement about the Collar Dosimeter is true?

• A. It is worn inside protective clothing
• B. It is used to evaluate the torso only
• C. It is color red
• D. It is always worn outside of protective clothing and worn as close to the thyroid as possible

Answer: (D)

The collar dosimeter is used to monitor radiation exposure to the head and neck region, especially the thyroid. Because that area is sensitive, the badge is worn outside protective clothing and placed as close to the thyroid as possible so its reading reflects the actual exposure to the neck, not shielding by the clothing or apron. Wearing it inside protective clothing would shield the badge and give a misleading, lower reading for neck exposure. The collar badge is not meant to measure the torso—that’s handled by another dosimeter. And the color isn’t a defining feature of the device.

The collar dosimeter is used to monitor radiation exposure to the head and neck region, especially the thyroid. Because that area is sensitive, the badge is worn outside protective clothing and placed as close to the thyroid as possible so its reading reflects the actual exposure to the neck, not shielding by the clothing or apron.

Wearing it inside protective clothing would shield the badge and give a misleading, lower reading for neck exposure. The collar badge is not meant to measure the torso—that’s handled by another dosimeter. And the color isn’t a defining feature of the device.