ASRT Student Exam Assessment Library (SEAL) Practice Exam 2025 - Free ASRT Practice Questions and Study Guide

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What is the function of a collimator in radiography?

To enhance image resolution

To limit the X-ray beam to the area of interest

The primary function of a collimator in radiography is to limit the X-ray beam to the area of interest. By restricting the size and shape of the X-ray beam, the collimator ensures that only the necessary area is exposed to radiation, which enhances the quality of the image and minimizes unnecessary exposure to surrounding tissues. This is crucial for both the accuracy of the diagnostic image and for patient safety, as it helps reduce the overall radiation dose administered during imaging procedures. By focusing the beam precisely, collimators play a vital role in improving image clarity and diagnostic efficacy.

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To increase patient radiation exposure

To change the angle of the X-ray beam

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