DQE(F) OF 4 GENERATIONS OF COMPUTED RADIOGRAPHY ACQUISITION DEVICES
DQE(F) OF 4 GENERATIONS OF COMPUTED RADIOGRAPHY ACQUISITION DEVICES
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DOI：
10.1118/1.597627
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发表时间：
1995-10-01
期刊：
影响因子：
3.8
通讯作者：
CLARK, DC
中科院分区：
文献类型：
--
作者：
DOBBINS, JT;ERGUN, DL;CLARK, DC
测量了四代CR成像板和三代CR显像仪的MTF(f)、NPS(f)和DQE(f)。总的来说，MTF在几代板块和读取器之间只有很小的变化，但DQE(f)从非常早期的板块/读取器组合到最近的组合有了很大的改进。在最近的板/读取器组合中，DQE在低频时比早期版本大1.3倍，在高频时比早期版本大3倍。因此，自从一些早期的观察研究表明CR的成像性能比screen-him差以来，CR的成像性能已经有了实质性的改善。
Measurements were made of the MTF(f), NPS(f), and DQE(f) of four generations of computed radiography (CR) imaging plates and three generations of CR image readers. The MTF generally showed only a minor change between generations of plates and readers, but the DQE(f) has improved substantially from a very early plate/reader combination to a more recent one. The DQE in the more recent plate/reader combination is 1.3x greater at low frequencies and about 3x greater at high frequencies than the much earlier versions. Thus there has been substantial improvement in the imaging performance obtainable with CR since some of the early observer studies which indicated poorer performance with CR than with screen-him.