Chest radiography: 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 · Chest radiography

Sample item

What does a silhouette sign on chest radiography help localize?

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

The answer and the reasoning

B. A pulmonary opacity contacting a normal border

Loss of a normally visible cardiac or diaphragmatic border occurs when adjacent lung opacity contacts it, helping localize the affected lobe.

Option by option

  • A. The patient's blood group

    Blood group is not radiographically visible.

  • B. A pulmonary opacity contacting a normal border (correct)

    Correct: border loss identifies an adjacent anatomical region.

  • C. Whether an opacity contains calcium

    Calcification requires density assessment rather than this sign.

  • D. The exact histological type of a lung mass

    Histology cannot be determined from a silhouette sign.

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, A pulmonary opacity contacting a normal border. Loss of a normally visible cardiac or diaphragmatic border occurs when adjacent lung opacity contacts it, helping localize the affected lobe.

Why is "The patient's blood group" not the answer?

Blood group is not radiographically visible.

Why is "Whether an opacity contains calcium" not the answer?

Calcification requires density assessment rather than this sign.

Why is "The exact histological type of a lung mass" not the answer?

Histology cannot be determined from a silhouette sign.

What concept does this question test?

It tests Chest radiography in Radiology. The correct option holds because: Correct: border loss identifies an adjacent anatomical region.

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 Chest radiography?

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.