DANB Radiology Practice Exam

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What is the maximum size of the x-ray beam at the patient's face?

3 inches

2.75 inches

The maximum size of the x-ray beam at the patient's face is established to ensure safety and minimize radiation exposure while still allowing for adequate imaging quality. The limit of 2.75 inches is based on guidelines designed to protect patients from unnecessary radiation while ensuring that the diagnostic images obtained are effective. This size helps focus the radiation to the area being imaged, reducing scatter radiation and enhancing image clarity.

In radiological practice, adhering to established sizes for the x-ray beam not only complies with safety standards but also promotes effective imaging techniques that support better patient outcomes and respects the principles of radiation protection, including justification and optimization. Therefore, the choice of 2.75 inches as the maximum beam size is consistent with regulatory guidelines aimed at patient safety and effective imaging practices.

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1.5 inches

4 inches

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