Advances in digital technology allowed the development of full digital X-ray detectors that are currently available for projection radiology. Digital radiography is a method of radiography that uses x-ray-sensitive plates to capture data during the patient examination directly and immediately transferring it to a computer system without the use of a standard cassette. The computed radiography process is to use a phosphor imaging plate to create a digital image. CR uses a cassette-based system like analog film. The DR technology transfer automatically the images to a computer.
Digital radiography is a method of radiography that uses x-ray-sensitive plates to capture data during the patient examination directly and immediately transferring it to a computer system without the use of a standard cassette. The computed radiography process is to use a phosphor imaging plate to create a digital image. CR uses a cassette-based system like analog film. The DR technology transfer automatically the images to a computer. Digital radiography has revolutionized and streamlined endodontic diagnosis and treatment. There are several advantages of digital x-ray imaging over analog film imaging that can benefit the clinician: reduced time, reduced radiation, ability to take multiple exposures without repositioning the sensor, storage and maintenance of the images, and electronic transmission of images. Digital radiography presents numerous advantages: a big dynamics bounded to an mostly linear response; an interactive parameter setting the examinations devices; aquasi-immediate availability of the image; operations of post-treatment on the images in order to improve their quality; the availability and the sharing of the images on local or distant stations. Today, the greater needs in flexibility and "real time", as well for the acquisition of the images as for the communications, the sharing of information, the processing and the computing exploitation of the big data bases of images, as well as the more and more frequent exploitation of the temporal dimension (movies-radiography) make the use of one of these new systems of digital radiography almost indispensable. The emergence of these technologies was allowed by progress of electronics and computing science and needs in instrumentation evolved at the same time as the increase of the performances of the computing simulation tools. The either optoelectronics or semiconductor new sensors achieve performances which can on certain points exceed those of the film systems: • high power of ruling allowing a high threshold of detection, • noise only limited by the statistics of detected photons X, • dynamics above 1000, • linearity on all the range of signal, • speed of evacuation of the data • frame rate…
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