Radiation effects: radiation cataract: 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 effects: radiation cataract

Sample item

Which tissue-reaction effect has the lowest threshold in occupational exposure and is of concern to interventional staff?

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

The answer and the reasoning

A. Lens opacity (cataract)

The lens is highly radiosensitive and opacities may develop with doses of around 0.5 Gy. The posterior subcapsular cataract is typical. Interventional operators are advised to wear leaded glasses.

Option by option

  • A. Lens opacity (cataract) (correct)

    Correct. The lens has a low threshold and is the effect of concern.

  • B. Permanent testicular sterility

    Permanent sterility requires doses of several grays.

  • C. Skin burn

    Skin burns occur at several grays.

  • D. Alopecia

    Alopecia needs a higher dose, about 3 Gy.

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 A, Lens opacity (cataract). The lens is highly radiosensitive and opacities may develop with doses of around 0.

Why is "Permanent testicular sterility" not the answer?

Permanent sterility requires doses of several grays.

Why is "Skin burn" not the answer?

Skin burns occur at several grays.

Why is "Alopecia" not the answer?

Alopecia needs a higher dose, about 3 Gy.

What concept does this question test?

It tests Radiation effects: radiation cataract in Radiology. 5 Gy. The posterior subcapsular cataract is typical. Interventional operators are advised to wear leaded glasses.

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 effects: radiation cataract?

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.