Lee K R, Siegel E L, Templeton A W, Dwyer S J, Murphey M D, Wetzel L H
Department of Diagnostic Radiology, University of Kansas Medical Center, Kansas City 66103.
Radiographics. 1991 Nov;11(6):1013-25; discussion 1026. doi: 10.1148/radiographics.11.6.1749846.
Technologic advances in digital radiography have improved the ways in which radiographic images are acquired, displayed, transmitted, recorded, and archived. With computed radiography, performed with storage phosphor plates and interactive high-resolution workstations, radiation dose is reduced and repeat exposures necessitated due to technical errors are eliminated. Digital fluorography allows reductions in dose, procedure time, and film costs. These digital imaging modalities have been well accepted clinically and are equal in diagnostic accuracy to conventional methods. Teleradiology has advanced with the development of laser film digitization, fiberoptic networks, and dial-up circuit switching technology. Laser film printers yield improved hard copies of transmitted images, but further work is needed to faithfully reproduce the images displayed on high-resolution work-stations. Although the capacity for archiving digital image data has increased (260,000 examinations or 23,500 Gbytes can be stored in a six-unit optical disc library), higher capacity storage media are needed. Further technologic advances in the speed of image transmission and storage capacity are anticipated.
数字放射成像技术的进步改进了获取、显示、传输、记录和存档射线照片的方式。通过使用存储磷光板和交互式高分辨率工作站进行的计算机放射成像,辐射剂量得以降低,并且消除了由于技术错误导致的重复曝光。数字荧光成像能够降低剂量、缩短检查时间并降低胶片成本。这些数字成像方式在临床上已被广泛接受,并且在诊断准确性方面与传统方法相当。随着激光胶片数字化、光纤网络和拨号电路交换技术的发展,远程放射学也取得了进步。激光胶片打印机能够提供质量更好的传输图像硬拷贝,但要如实地再现高分辨率工作站上显示的图像还需要进一步努力。尽管存档数字图像数据的容量有所增加(一个六单元光盘库可存储260,000次检查或23,500千兆字节的数据),但仍需要容量更大的存储介质。预计在图像传输速度和存储容量方面还会有进一步的技术进步。