题目内容
After a film is exposed, the target-film distance is doubled. The exposure time necessary to obtain a second film of equal density to the first film is
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If the mA is increased while the kVp and exposure time are kept constant, the resulting films will _____.
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A radiograph is taken by using 70kVp and 15mAs. If the radiograph is repeated using 80kVp, what mAs should be used to maintain the original density?
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