Developments in digital radiography: an equipment update

被引:19
作者
James, JJ
Davies, AG
Cowen, AR
O'Connor, PJ
机构
[1] Gen Infirm, Dept Clin Radiol, Leeds LS1 3EX, W Yorkshire, England
[2] Univ Leeds, Dept Med Phys, Leeds LS1 3EX, W Yorkshire, England
关键词
digital radiography; radiographic image enhancement; radiological technology; thoracic radiography; fluoroscopy;
D O I
10.1007/s003300100828
中图分类号
R8 [特种医学]; R445 [影像诊断学];
学科分类号
1002 [临床医学]; 100207 [影像医学与核医学]; 1009 [特种医学];
摘要
Digital X-ray imaging technology has advanced rapidly over the past few years. This review, particularly aimed at those involved in using and purchasing such technology, is an attempt to unravel some of the complexities of this potentially confusing subject. The main groups of X-ray imaging devices that are considered are digitisers of conventional radiographs. image-intensifier-based fluorography systems, photostimulable phosphor computed radiography, amorphous selenium-based technology for thorax imaging and flat-panel systems. As well as describing these different systems, we look at ways of objectively assessing their image quality. Concepts that are used and explained include spatial resolution, grey-scale bit resolution, signal-to-noise ratio and detective quantum efficiency. An understanding of these basic parameters is vital in making a scientific assessment of a system's performance. Image processing and techniques are also briefly discussed, particularly with reference to their potential effects on image quality. This review aims to provide a basic understanding of digital X-ray imaging technology and enables the reader to make an independent and educated assessment of the relative merits of each system.
引用
收藏
页码:2616 / 2626
页数:11
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