The intensity of an x-ray beam created with one half-value layer (HVL) of filtration resulted in an intensity of 75 microgray (uGy). What is the expected intensity of the beam if the filtration is removed?

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Multiple Choice

The intensity of an x-ray beam created with one half-value layer (HVL) of filtration resulted in an intensity of 75 microgray (uGy). What is the expected intensity of the beam if the filtration is removed?

Explanation:
Half-value layer filtration cuts the beam’s intensity by about half. If the beam with the HVL in place yields 75 μGy, removing that filtration removes the half-strength attenuation, so the intensity doubles. 75 μGy × 2 = 150 μGy. So the beam would be expected to have about 150 μGy without the filtration.

Half-value layer filtration cuts the beam’s intensity by about half. If the beam with the HVL in place yields 75 μGy, removing that filtration removes the half-strength attenuation, so the intensity doubles. 75 μGy × 2 = 150 μGy. So the beam would be expected to have about 150 μGy without the filtration.

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