Which film speeds reduce patient dose by 50% compared to D-speed films?

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Prepare for the South Carolina Dental Association Radiation Safety Test with flashcards and multiple choice questions, complete with hints and explanations. Get ready for success!

Multiple Choice

Which film speeds reduce patient dose by 50% compared to D-speed films?

Explanation:
Faster film speeds let you achieve the same image quality with less radiation, so the patient dose drops as speed increases. D-speed is the older, slower baseline. E-speed film reduces the required exposure by about half compared with D-speed, and F-speed is even faster, reducing exposure further. Therefore, speeds that meet or exceed that 50% reduction are E-speed and F-speed. The option that lists both E-speed and F-speed films is the best choice because it reflects the speeds that achieve this dose reduction.

Faster film speeds let you achieve the same image quality with less radiation, so the patient dose drops as speed increases. D-speed is the older, slower baseline. E-speed film reduces the required exposure by about half compared with D-speed, and F-speed is even faster, reducing exposure further. Therefore, speeds that meet or exceed that 50% reduction are E-speed and F-speed. The option that lists both E-speed and F-speed films is the best choice because it reflects the speeds that achieve this dose reduction.

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