MRI: angiography: 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 · MRI: angiography

Sample item

Which MR technique images vessels without any contrast injection by using inflow of unsaturated blood?

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

The answer and the reasoning

C. Time-of-flight MR angiography

In time-of-flight angiography, stationary tissue becomes saturated while fresh inflowing blood gives high signal. It is useful in patients who cannot receive contrast. Phase contrast angiography is another non-contrast technique.

Option by option

  • A. Conventional catheter angiography

    Catheter angiography uses iodinated contrast.

  • B. CT angiography

    CT angiography needs iodinated contrast.

  • C. Time-of-flight MR angiography (correct)

    Correct. TOF depends on inflow enhancement, with no contrast needed.

  • D. Gadolinium-enhanced MRA

    Gadolinium-enhanced MRA requires an injection.

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, Time-of-flight MR angiography. In time-of-flight angiography, stationary tissue becomes saturated while fresh inflowing blood gives high signal.

Why is "Conventional catheter angiography" not the answer?

Catheter angiography uses iodinated contrast.

Why is "CT angiography" not the answer?

CT angiography needs iodinated contrast.

Why is "Gadolinium-enhanced MRA" not the answer?

Gadolinium-enhanced MRA requires an injection.

What concept does this question test?

It tests MRI: angiography in Radiology. It is useful in patients who cannot receive contrast. Phase contrast angiography is another non-contrast technique.

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 MRI: angiography?

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.