American Society of Radiologic Technologist (ASRT) Practice Exam

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

Prepare for the American Society of Radiologic Technologist Exam. Utilize flashcards and multiple-choice questions, with hints and explanations for each. Boost your confidence and ensure success!

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.

The selection of a small focal spot size helps to improve which aspect of imaging?

Spatial resolution
Minimize motion blur
Decrease entrance skin exposure
Increase contrast resolution

The correct answer is: Spatial resolution

Selecting a small focal spot size is crucial for enhancing spatial resolution in imaging. Spatial resolution refers to the ability of an imaging system to distinguish between small objects that are close together. A smaller focal spot produces a sharper image because it reduces the penumbra effect, which is the blurring at the edges of structures being imaged. The smaller the focal spot, the more precise the X-ray beam is, thereby improving the detail and clarity of the image. This increased spatial resolution allows for better visualization of fine details and structures within the body, which is particularly important in diagnosing conditions that require high levels of detail, such as in radiography of bones or small anatomical features. Therefore, the use of a small focal spot size directly correlates with improved spatial resolution, making it a key factor in achieving high-quality imaging outcomes.