Radiation safety: lead apron: practice question

A Radiology question in the style of the NEET PG paper. Answer it first, then read why the right option is right and why each of the others is wrong.

Try it

Radiology · Radiation safety: lead apron

Sample item

A radiology worker wearing a lead apron for fluoroscopy is protected best if the apron has what lead equivalence?

AAt least 0.25 mm Pb (0.5 mm often preferred for interventional work)B5 mm PbCNo lead is needed if the worker stands behind a glass windowD0.01 mm Pb

Original practice item, not a recalled exam question. Nothing here is recorded.

The answer and the reasoning

A. At least 0.25 mm Pb (0.5 mm often preferred for interventional work)

Protective aprons typically contain 0.25 to 0.5 mm lead equivalent, which attenuates most scattered radiation at diagnostic energies. Very thin layers offer little protection and 5 mm would be impractically heavy. Thyroid shields and lead glasses complement an apron.

Option by option

A. At least 0.25 mm Pb (0.5 mm often preferred for interventional work) (correct)
Correct. 0.25 to 0.5 mm Pb is the standard.
B. 5 mm Pb
5 mm is not used as it is too heavy.
C. No lead is needed if the worker stands behind a glass window
Standing behind glass without lead cannot protect staff who must stay in the room.
D. 0.01 mm Pb
0.01 mm provides negligible protection.

Source note: Original NextPrep sample item — pending expert review. This item is original practice material awaiting independent expert review, so confirm important facts in a standard textbook.

Questions about this Radiology question

What is the answer to this Radiology question?

The best answer is A, At least 0.25 mm Pb (0.5 mm often preferred for interventional work). Protective aprons typically contain 0.

Why is "5 mm Pb" not the answer?

5 mm is not used as it is too heavy.

Why is "No lead is needed if the worker stands behind a glass window" not the answer?

Standing behind glass without lead cannot protect staff who must stay in the room.

Why is "0.01 mm Pb" not the answer?

0.01 mm provides negligible protection.

What concept does this question test?

It tests Radiation safety: lead apron in Radiology. 25 to 0.5 mm lead equivalent, which attenuates most scattered radiation at diagnostic energies. Very thin layers offer little protection and 5 mm would be impractically heavy. Thyroid shields and lead glasses complement an apron.

How hard is this question?

We tag it as an application question: it asks you to use a fact on a patient or a finding. The tag is our own editorial judgement, not an official difficulty rating, so read the reason for every option, not only the answer.

How should I study Radiation safety: lead apron?

Learn signs with the image, and the disease they point to. Then use the flashcards and the other Radiology questions on this site to test what stuck.

Is this a real NEET PG question?

No. It is an original practice item (editorial status: sample, version 1). NextPrep does not publish recalled or leaked questions, and independent faculty review of this item has not been completed yet, so confirm important facts in a standard textbook.