Radiation safety and radiobiology: optically stimulated luminescence dosimeter: 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: optically stimulated luminescence dosimeter

Sample item

Which personal dosimeter uses aluminium oxide crystals that release light when stimulated by a laser, and can be re-read for dose?

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

The answer and the reasoning

C. Optically stimulated luminescence dosimeter

OSL dosimeters store dose in aluminium oxide and release it as light on laser stimulation, which allows rapid reading and repeat readings. Film badges use silver halide blackening and TLDs release light on heating.

Option by option

  • A. Film badge

    Film badges record dose by blackening of photographic emulsion.

  • B. Thermoluminescent dosimeter

    TLDs release stored energy as light on heating and not on laser stimulation.

  • C. Optically stimulated luminescence dosimeter (correct)

    Correct. Laser stimulation of aluminium oxide is the basis of OSL.

  • D. Geiger-Muller counter

    A Geiger-Muller counter is a gas-filled survey meter and not a personal dosimeter.

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, Optically stimulated luminescence dosimeter. OSL dosimeters store dose in aluminium oxide and release it as light on laser stimulation, which allows rapid reading and repeat readings.

Why is "Film badge" not the answer?

Film badges record dose by blackening of photographic emulsion.

Why is "Thermoluminescent dosimeter" not the answer?

TLDs release stored energy as light on heating and not on laser stimulation.

Why is "Geiger-Muller counter" not the answer?

A Geiger-Muller counter is a gas-filled survey meter and not a personal dosimeter.

What concept does this question test?

It tests Radiation safety and radiobiology: optically stimulated luminescence dosimeter in Radiology. Film badges use silver halide blackening and TLDs release light on heating.

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: optically stimulated luminescence dosimeter?

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.