American Registry of Radiologic Technologists (ARRT) Practice Exam

Image Description

Question: 1 / 400

What is the result of using a larger focal spot size on recorded detail?

Increases it

Decreases it

Using a larger focal spot size typically decreases recorded detail in radiographic images. The focal spot refers to the area on the anode where the x-ray beam is produced. A larger focal spot results in less sharpness in the image due to increased penumbra, which is the blurred edge around the image of the anatomical structure. This occurs because the greater size of the focal spot leads to more scattered radiation and less precise localization of the x-rays.

In contrast, a smaller focal spot size improves recorded detail and sharpness, as it narrows the area of radiation, which can produce more finely defined images. Thus, using a larger focal spot size has a direct negative effect on the recorded detail. This principle is critical for radiologic technologists to understand, as it influences the choice of settings for different imaging situations, emphasizing the need for balancing exposure factors and image quality.

Get further explanation with Examzify DeepDiveBeta

No change

Enhances visibility

Next Question

Report this question

Download American Registry of Radiologic Technologists (ARRT) Practice Exam PDF Study Guide
Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy