计算机X线摄影和胶片数字化仪输入重症监护病房远程放射学系统：图像质量比较
Computed radiography and film digitizer inputs to an intensive care unit teleradiology system: an image quality comparison.
作者信息
Huda W, Honeyman J C, Palmer C K, Frost M M, Staab E V
机构信息
Department of Radiology, University of Florida College of Medicine, Gainesville 32610-0374, USA.
出版信息
Acad Radiol. 1996 Feb;3(2):110-4. doi: 10.1016/s1076-6332(05)80375-7.
RATIONALE AND OBJECTIVES
We compared computed radiography (CR) with a film digitizer as an image input device for transmitting radiographs to intensive care unit (ICU) displays.
METHODS
Limiting spatial resolution and low-contrast detectability performance were determined for a 600-speed screen-film combination and CR films. The same image data were transmitted to ICU displays directly from the CR or by digitizing the conventional film.
RESULTS
CR resolution ranged from 2.5 to 3 line pairs per millimeter (Ip/ mm) depending on cassette size. Display station resolution for the CR image data was 1.5-1.9 lp/mm, but improved resolution could be achieved using display magnification modes. Film digitization resulted in a loss of resolution. Direct transmission of CR image data to display stations gave low-contrast detectability similar to that obtained with CR film.
CONCLUSION
ICU teleradiology displays that use CR, rather than film digitizers, offer improved image quality and superior operational efficiency.
原理与目的
我们比较了计算机X线摄影（CR）与胶片数字化仪作为将X线片传输至重症监护病房（ICU）显示器的图像输入设备。
方法
测定了600速增感屏-胶片组合和CR胶片的极限空间分辨率及低对比度可探测性性能。相同的图像数据直接从CR传输至ICU显示器，或通过对传统胶片进行数字化处理后传输。
结果
CR分辨率根据暗盒尺寸在每毫米2.5至3线对（lp/mm）之间。CR图像数据的显示器分辨率为1.5 - 1.9 lp/mm，但使用显示放大模式可提高分辨率。胶片数字化导致分辨率损失。将CR图像数据直接传输至显示器可获得与CR胶片相似的低对比度可探测性。
结论
使用CR而非胶片数字化仪的ICU远程放射学显示器可提供更高的图像质量和卓越的操作效率。
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