Beam restriction has the following effect on contrast?

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Study for the Mosby Radiography Test. Utilize flashcards and multiple choice questions with hints and explanations. Prepare for your exam with confidence!

Multiple Choice

Beam restriction has the following effect on contrast?

Explanation:
Beam restriction lowers scattered radiation reaching the detector. Scatter adds fog that blurs tissue differences, so by restricting the beam you reduce this fog and enhance the distinction between structures. This makes the image contrast higher, which is described as a shorter grayscale scale (fewer gray shades). So the effect is a shorter scale of contrast. It doesn’t decrease contrast, and it isn’t without effect.

Beam restriction lowers scattered radiation reaching the detector. Scatter adds fog that blurs tissue differences, so by restricting the beam you reduce this fog and enhance the distinction between structures. This makes the image contrast higher, which is described as a shorter grayscale scale (fewer gray shades). So the effect is a shorter scale of contrast. It doesn’t decrease contrast, and it isn’t without effect.

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