For a half-value layer test, the following exposures are mea…
For a half-value layer test, the following exposures are measured by an ion chamber with increasing amounts of aluminum absorber placed in the beam as indicated below. What is the HVL for this x-ray beam? 0 mm Al: 160 mR1 mm Al: 100 mR2 mm Al: 60 mR3 mm Al: 30 mR
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