American Registry of Radiologic Technologists (ARRT) Practice Exam

Disable ads (and more) with a membership for a one time $2.99 payment

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.

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.

What effect does windowing have on radiologic images?

Alters image resolution
Changes image brightness
Increases exposure time
Improves image contrast

The correct answer is: Changes image brightness

Windowing in radiologic imaging primarily refers to the process of adjusting the brightness and contrast of an image displayed on a monitor. This adjustment allows radiologists and technologists to highlight specific structures within the image by controlling the range of grayscale levels represented. When window width is adjusted, it affects the contrast of the image, while window level adjustment impacts the brightness. For example, increasing the window level can brighten the image, making structures that are otherwise too dark visible. Conversely, decreasing the window level can darken the image. This manipulation helps in evaluating the details of tissues and abnormalities more effectively, facilitating better diagnoses. Options that suggest alterations to image resolution, increased exposure time, or improved contrast do not directly describe the specific function of windowing. While windowing can enhance the perceived contrast within specific regions of interest, it does not fundamentally change the physical properties of the image such as resolution or exposure parameters. Consequently, the correct answer revolves around how windowing influences the brightness of radiologic images.