While a number of medical imaging technologies have had digital capabilities for many years, the most common imaging modality--radiography, or x-ray imaging--has continued to rely on film to record its images. Now, however, digital radiography is becoming more practical and more widely available. We present this article as an introduction to the technology and as a means to compare and contrast it with familiar film-based systems.
虽然许多医学成像技术多年来一直具备数字功能，但最常见的成像方式——放射摄影，即X光成像——仍继续依靠胶片来记录图像。然而，如今数字放射摄影正变得更加实用且应用更为广泛。我们撰写本文旨在介绍这项技术，并将其与大家熟悉的基于胶片的系统进行比较和对比。
