The quality and information of digital x-ray images can rivals the traditional x-ray imaging. Image processing system can adjust the contrast to get the best visual effects; the rang of imaging is more larger; patients receive less medical x ray radiation; and image information can be stored in disk or CD-ROM, and transmitted. Those are the advantages of digital images.
Digital image technique now wildly applies in digital radiography. Digital images and traditional X-ray images are taken by the overlapping part of the overall image, therefore, digital radiography can image the parts which traditional x-ray can film, and observation and analysis of DR images are same as conventional x-ray. The difference is that DR image is composed of a certain number of pixels.
Digital images are better than traditional x-ray for diagnosing bone structure, cartilage and soft tissue, and it also can analyze the salt content of mineral in quantitative analysis. Digital image is easy to show mediastinal structures such as blood vessels and trachea, and the detection of nodules is higher than conventional X-ray imaging, but not better than the traditional x-ray to show the pulmonary interstitial and alveolar disease.
For diagnosing intestinal gas, pneumoperitoneum, and stones, digital radiography precede traditional x-ray film. Using digital image to do tomography is better than traditional x-ray, and On showing the minimal change disease and intestinal mucosa folds in double contrast radiography, the digital image is better than traditional X-ray imaging.
Digital radiography is a new imaging technique. It superior to the traditional X-ray imaging in many respects, but to the benefits and price, it is difficult to replace the conventional X-ray imaging. In clinical applications, digital radiography is not like CT and MRI that can not be replaced.
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