千伏和滤过对牙科X线胶片感光度的影响。
The effects of kilovoltage and filtration on dental radiographic film sensitivity.
作者信息
Price C
出版信息
Oral Surg Oral Med Oral Pathol. 1982 Mar;53(3):318-21. doi: 10.1016/0030-4220(82)90309-7.
A sensitometric method was used to compare the effects of changing kilovoltage and filtration on the sensitivity of a dental radiographic emulsion. Five combinations were investigated: 90 kVp, 3.5 mm. aluminum filtration; 90 kVp, 2.5 mm. Al; 70 kVP, 2.5 mm. Al; 70 kVp, 1.5 mm Al; and 50 kVp, 1.5 mm. Al. Maximum emulsion sensitivity was demonstrated at 90 kVp and 3.5 mm.aluminum filtration; 90 kVp, 2.5 mm. Al and 70 kVp, 2.5 mm. Al showed slight reductions in sensitivity (4 percent and 6 percent, respectively). A progressively greater reduction in emulsion sensitivity was observed at 70 kVp, 1.5 mm. Al (10 percent) and 50 kVp, 1.5 mm. Al (26 percent). Emulsion sensitivity is one factor to be considered when one is selecting beam quality.
采用感光测定法比较改变千伏值和滤过对牙科X线摄影乳剂感光度的影响。研究了五种组合：90千伏峰值、3.5毫米铝滤过；90千伏峰值、2.5毫米铝滤过；70千伏峰值、2.5毫米铝滤过；70千伏峰值、1.5毫米铝滤过；以及50千伏峰值、1.5毫米铝滤过。在90千伏峰值和3.5毫米铝滤过条件下乳剂感光度最高；90千伏峰值、2.5毫米铝滤过和70千伏峰值、2.5毫米铝滤过条件下感光度略有降低（分别降低4%和6%）。在70千伏峰值、1.5毫米铝滤过（降低10%）和50千伏峰值、1.5毫米铝滤过（降低26%）条件下观察到乳剂感光度逐渐大幅降低。在选择射线质时，乳剂感光度是一个需要考虑的因素。
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