Radiation safety and radiobiology: extremity dosimetry: 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: extremity dosimetry

Sample item

A technologist who draws up Tc-99m syringes every day is concerned about the dose to her hands. Which monitoring device records this specifically?

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

The answer and the reasoning

C. Extremity ring dosimeter worn on the finger

Hands receive much higher doses than the trunk during syringe handling, so an extremity ring dosimeter worn on the finger nearest the source is used. Chest and collar badges measure whole-body or thyroid-level dose, and fixed monitors record room levels.

Option by option

  • A. Fixed area monitor in the radiopharmacy

    A fixed area monitor records ambient levels, not personal exposure.

  • B. Whole-body badge worn on the chest

    A chest badge measures trunk dose and underestimates hand dose.

  • C. Extremity ring dosimeter worn on the finger (correct)

    Correct. A ring dosimeter measures the dose to the fingers.

  • D. Pocket dosimeter clipped to the collar

    A collar dosimeter reflects dose to the head and neck, not the hands.

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.

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Questions about this Radiology question

What is the answer to this Radiology question?

The best answer is C, Extremity ring dosimeter worn on the finger. Hands receive much higher doses than the trunk during syringe handling, so an extremity ring dosimeter worn on the finger nearest the source is used.

Why is "Fixed area monitor in the radiopharmacy" not the answer?

A fixed area monitor records ambient levels, not personal exposure.

Why is "Whole-body badge worn on the chest" not the answer?

A chest badge measures trunk dose and underestimates hand dose.

Why is "Pocket dosimeter clipped to the collar" not the answer?

A collar dosimeter reflects dose to the head and neck, not the hands.

What concept does this question test?

It tests Radiation safety and radiobiology: extremity dosimetry in Radiology. Chest and collar badges measure whole-body or thyroid-level dose, and fixed monitors record room levels.

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: extremity dosimetry?

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.