Which statement about the lead apron and thyroid collar is NOT true?

• A. They shield the body and thyroid from scatter radiation.
• B. They can completely eliminate exposure.
• C. They reduce radiation exposure.
• D. They should be used during radiographic procedures.

Answer: (B)

The concept here is that shielding reduces radiation dose but does not completely eliminate it. A lead apron and thyroid collar protect by absorbing scatter radiation that results after the primary X-ray beam passes through the patient. They help shield sensitive areas like the thyroid and torso, and they should be used during radiographic procedures to lower overall exposure.

However, they cannot completely eliminate exposure. Some radiation can still reach tissues due to scatter, leakage, or if the primary beam or shielding is not used or positioned correctly. Therefore, the statement that they can completely eliminate exposure is not true, while the other statements—shielding the body and thyroid, reducing exposure, and being used during procedures—are accurate.