American Registry of Radiologic Technologists (ARRT) Practice Exam

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Prepare for the American Registry of Radiologic Technologists Test with engaging quizzes and detailed explanations. Boost your test readiness with multiple-choice questions designed to enhance your knowledge and confidence.

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A higher ratio grid results in what?

  1. More grays

  2. Fewer grays

  3. No change in grays

  4. Increased radiation

The correct answer is: Fewer grays

A higher ratio grid effectively reduces the amount of scattered radiation that reaches the image receptor while allowing more primary radiation to pass through. This increase in the ratio of the grid means that it can effectively absorb more scattered rays, which would contribute to image degradation if allowed to reach the receptor. As a result, the final image produced will have less scatter and greater contrast, leading to fewer shades of gray or "grays" in the image. This is what makes the image appear sharper and more defined; the increased contrast results in a clearer distinction between the differing densities in the imaged anatomy. Therefore, the choice indicating "fewer grays" accurately reflects the impact of a higher ratio grid on image quality.

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