What is the intensity of an x-ray beam created with one half-value layer (HVL) of filtration if the unfiltered intensity is 100 microgray (uGy)?

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Multiple Choice

What is the intensity of an x-ray beam created with one half-value layer (HVL) of filtration if the unfiltered intensity is 100 microgray (uGy)?

Explanation:
A half-value layer reduces the X-ray beam’s intensity by 50% for the given beam energy and filtration. So applying one HVL to an initial intensity of 100 microgray leaves 50 microgray. The other options would require different conditions (for example, two HVLs would give 25 microgray, and intensities of 150 or 200 microgray would imply the beam got stronger, which isn’t produced by a single HVL).

A half-value layer reduces the X-ray beam’s intensity by 50% for the given beam energy and filtration. So applying one HVL to an initial intensity of 100 microgray leaves 50 microgray. The other options would require different conditions (for example, two HVLs would give 25 microgray, and intensities of 150 or 200 microgray would imply the beam got stronger, which isn’t produced by a single HVL).

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