Which statement about magnification and spatial resolution in DR is true?

Study for the RTBC Fundamentals of Digital Radiography Test. Utilize flashcards and multiple-choice questions with hints and explanations. Prepare thoroughly for your exam!

Multiple Choice

Which statement about magnification and spatial resolution in DR is true?

Explanation:
Magnification in DR affects geometric unsharpness. When you increase the distance between the object and the detector (OID) to achieve magnification, the finite size of the X-ray focal spot projects more blur onto the image. That blur, or penumbra, grows with magnification, making two nearby points harder to distinguish. So spatial resolution—the ability to resolve fine detail—decreases as magnification increases. The other statements are not correct: magnification does not improve resolution, nor does it leave resolution unchanged, and its effect isn’t limited to dose alone.

Magnification in DR affects geometric unsharpness. When you increase the distance between the object and the detector (OID) to achieve magnification, the finite size of the X-ray focal spot projects more blur onto the image. That blur, or penumbra, grows with magnification, making two nearby points harder to distinguish. So spatial resolution—the ability to resolve fine detail—decreases as magnification increases. The other statements are not correct: magnification does not improve resolution, nor does it leave resolution unchanged, and its effect isn’t limited to dose alone.

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