American Society of Radiologic Technologist (ASRT) Practice Exam

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Prepare for the ASRT Test. Study with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

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What is the unit of measure for display monitor luminance?

  1. Candela per square meter

  2. Milligray per second

  3. Line pairs per millimeter

  4. Lines per centimeter

The correct answer is: Candela per square meter

The unit of measure for display monitor luminance is indeed candela per square meter. This unit quantifies the intensity of light emitted or reflected from a surface that can be perceived by the human eye. In the context of medical imaging and radiology, luminance is a crucial factor because it influences the visibility of images on a monitor. A high luminance value indicates a brighter display, which is important for accurately interpreting medical images. For display technology, especially in radiology where diagnostic images must be viewed in detail, understanding luminance helps ensure that the images are not only bright enough to be evaluated properly but also that the contrast and resolution meet the necessary clinical standards for accurate diagnosis.