Digital radiography is a type of advanced medical x ray machine, formed by computer technology and digital image processing technology combine x-ray radiation. On the basis of direct film imaging of original diagnostic x-ray machine, medical x ray machine process image in real time to realize digital image by the A / D conversion and D / A conversion. Digital x-ray appears to break the traditional concept of x-ray machine, and achieve that simulant x-ray images change into digital x-ray images.
Digital radiography has some features:
First, the most prominent advantage is the high resolution, image in clarity and detail, and the doctor can get a good diagnosis, according to the need of, such as digital subtraction post-processing, many types of image post-processing.
Second, in the status of fluoroscopy, the medical x ray equipment can display digital images in real time, so the doctor can image digital photography according to the disease status of patients, and then get the reliable information of clinical diagnosis through a series of image post-processing such as edge enhancement, zoom, black and white flip, image smoothing function, especially for the early discovery of lesions, it can provide a good diagnostic conditions.
Third, digital image formed by digital radiography requires less x-ray dose than traditional film imaging, so DR can provide high-definition images in using lower doses of X-ray, and reduce the harm of x-ray radiation to patients at the same time.
Fourth, because digital radiography changed the method from traditional film photography, the radiology image management throw out the original method of image management, and eliminates the need of image room, instead using computer to manage the image files, and it save a lot of resources and costs, and greatly improve efficiency of work. In addition, as the emergence of digital radiography, it end the history of PACS in which x-ray images can not enter the hospital, and provide a great convenience for the remote expert consultation and online exchanges. On the other hand, the medical x ray equipment can show several images at the same time, and doctor would get the comparison between each image. It helps the doctor get the accurate identification and diagnosis. The doctor also can review the whole process of the examination through the image playback.

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