CT: 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 · CT

Sample item

What CT number is assigned to water by convention?

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

The answer and the reasoning

B. Zero Hounsfield units

The central CT principle supports Zero Hounsfield units; it is the answer that most directly explains the image finding, modality choice, or oral-health feature described.

Option by option

  • A. Plus 1000 Hounsfield units

    Plus 1000 Hounsfield units may be used elsewhere but is not the strongest answer here.

  • B. Zero Hounsfield units (correct)

    Correct. Zero Hounsfield units best matches the key information in this scenario.

  • C. One hundred Tesla

    One hundred Tesla is not supported by the imaging or dental clue provided.

  • D. Minus 1000 Hounsfield units

    Minus 1000 Hounsfield units does not fit the stated ct context.

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.

More Radiology questions

Questions about this Radiology question

What is the answer to this Radiology question?

The best answer is B, Zero Hounsfield units. The central CT principle supports Zero Hounsfield units; it is the answer that most directly explains the image finding, modality choice, or oral-health feature described.

Why is "Plus 1000 Hounsfield units" not the answer?

Plus 1000 Hounsfield units may be used elsewhere but is not the strongest answer here.

Why is "One hundred Tesla" not the answer?

One hundred Tesla is not supported by the imaging or dental clue provided.

Why is "Minus 1000 Hounsfield units" not the answer?

Minus 1000 Hounsfield units does not fit the stated ct context.

What concept does this question test?

It tests CT in Radiology. The correct option holds because: Correct. Zero Hounsfield units best matches the key information in this scenario.

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 CT?

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.