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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As mAs is increased, what happens to the density?

Increases
Decreases
Remains constant
Variable

The correct answer is: Increases

When milliamperes per second (mAs) is increased, the density of the radiographic image also increases. This relationship is due to the direct effect that mAs has on the quantity of x-ray photons produced during an exposure. Increasing mAs results in a greater number of x-ray photons being generated, which translates to a higher amount of radiation reaching the image receptor. This increased exposure leads to a darker image because more photons hit the receptor, resulting in a greater degree of blackening on the film or increased signal in digital imaging systems. In practice, when adjusting mAs, radiologic technologists aim for the appropriate level of density to achieve optimal image quality. Therefore, understanding that an increase in mAs will lead to increased density is essential for effectively managing exposure factors in radiography.