Radiation safety and radiobiology: dosimeter placement in interventional work: 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.

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Radiology · Radiation safety and radiobiology: dosimeter placement in interventional work

Sample item

An interventional cardiologist who wears a lead apron is issued two personal dosimeters for estimating effective dose. Where should they be worn?

AOne on each wristBOne under the apron at the waist or chest and one outside at the collarCBoth under the apron at the collarDBoth outside the apron at the waist

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

The answer and the reasoning

B. One under the apron at the waist or chest and one outside at the collar

The badge under the apron estimates the dose to the shielded trunk organs. The badge outside at the collar estimates the dose to the thyroid and lens, which are unshielded, and the two readings are combined in an algorithm.

Option by option

A. One on each wrist
Wrist badges are used for extremity dose and are not the standard pair for effective dose.
B. One under the apron at the waist or chest and one outside at the collar (correct)
Correct. This pairing measures both the shielded trunk dose and the unshielded head and neck dose.
C. Both under the apron at the collar
Both under the apron would miss the exposure of the unshielded neck and lens.
D. Both outside the apron at the waist
Two badges outside the apron would overestimate the dose to protected organs.

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 B, One under the apron at the waist or chest and one outside at the collar. The badge under the apron estimates the dose to the shielded trunk organs.

Why is "One on each wrist" not the answer?

Wrist badges are used for extremity dose and are not the standard pair for effective dose.

Why is "Both under the apron at the collar" not the answer?

Both under the apron would miss the exposure of the unshielded neck and lens.

Why is "Both outside the apron at the waist" not the answer?

Two badges outside the apron would overestimate the dose to protected organs.

What concept does this question test?

It tests Radiation safety and radiobiology: dosimeter placement in interventional work in Radiology. The badge outside at the collar estimates the dose to the thyroid and lens, which are unshielded, and the two readings are combined in an algorithm.

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 and radiobiology: dosimeter placement in interventional work?

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.