Imaging physics: digital 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 · Imaging physics: digital radiography

Sample item

A main advantage of digital (CR/DR) radiography over screen-film radiography is which of the following?

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

The answer and the reasoning

A. Wide dynamic range allowing post-processing and fewer repeats from exposure errors

Digital detectors have a wide dynamic range and allow the image brightness and contrast to be adjusted after acquisition. This reduces repeat exposures due to over- or underexposure. Radiation is still used and spatial resolution is not necessarily better, which is a cause for dose creep.

Option by option

  • A. Wide dynamic range allowing post-processing and fewer repeats from exposure errors (correct)

    Correct. Wide dynamic range and post-processing reduce retakes.

  • B. Higher spatial resolution than all film systems

    Film can have equal or higher spatial resolution.

  • C. No need for any shielding

    Shielding is still required.

  • D. Complete elimination of radiation exposure

    Radiation is still needed to form the image.

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, Wide dynamic range allowing post-processing and fewer repeats from exposure errors. Digital detectors have a wide dynamic range and allow the image brightness and contrast to be adjusted after acquisition.

Why is "Higher spatial resolution than all film systems" not the answer?

Film can have equal or higher spatial resolution.

Why is "No need for any shielding" not the answer?

Shielding is still required.

Why is "Complete elimination of radiation exposure" not the answer?

Radiation is still needed to form the image.

What concept does this question test?

It tests Imaging physics: digital radiography in Radiology. This reduces repeat exposures due to over- or underexposure. Radiation is still used and spatial resolution is not necessarily better, which is a cause for dose creep.

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 Imaging physics: digital 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.