DR and CR are also imaging devices that are the result of improvements in traditional X-ray machines through digital technology. Despite this, but the two imaging methods are very different
DR is a direct X-ray conversion technology, digital radiography, the system consists of a digital image acquisition board dedicated filter BUCKY digital image acquisition control radiography system digital image workstation. In the amorphous silicon image board, X-rays are converted into visible light by the fluorescent screen, and then converted into electronic signals by TFT thin-film crystal circuits according to the matrix pixel, and transmitted to the computer, the image will be displayed through the monitor, can also be transmitted into the PACS network.
CR imaging principle is to use the imaging panel IP (Imaging Panel) instead of the traditional film sensitization screen, with the storage media to record X-ray images, through the laser scanning so that the stored signal is converted into optical signals, and then converted into a photomultiplier is the signal, after the A/D conversion, input computer processing, become a high-quality digital image.
The technical characteristics of DR are small radiation dose and large exposure window. The digital image has a good recognition rate, good image sharpness, clear details, and can be based on clinical needs for a variety of image post-processing and other advantages. It realizes filmless radiology, networking between departments and hospitals, and facilitates teaching and consultation.
CR's technical characteristics image processing system can be adjusted contrast, so it can achieve the best visual effect; taking pictures of the conditions of a larger range of tolerance; the patient to receive a reduced amount of X-ray. Image information can be stored and transmitted by disk or CD-ROM.
DR has obvious advantages over CR, with clear and accurate images and fast imaging speeds. It takes an average of 7.5 minutes/person per patient to use X-ray conventional radiography, 6 minutes/person for CR photography, and 2.5 minutes/person for DR photography.
But when it comes to price, CR is significantly cheaper than DR, as long as the IP plate replaces the original film cassette in the conventional radiographic film setup. DR, on the other hand, requires the purchase of a brand new one.
DR and CR will ****exist for a long time, DR is suitable for fluoroscopy and spot film, a variety of contrast examinations, CR is suitable for complex positions; DR is expensive for large hospitals, CR is cheap for small and medium-sized hospitals.