File Name: difference between computed radiography and digital radiography .zip
There is no doubt that all digital radiographic images share many characteristics regardless of the technology with which they are acquired simply because they are all digital approximations of an analog projection. Digital radiography devices typically have wide latitude, which results in low contrast if the digital image is mapped to a display device of limited latitude without appropriate rescaling.
- Understanding the Differences Between Computed Radiography & Digital Radiography
- Digital vs.Computed Radiography
- Digital radiography: The bottom line comparison of CR and DR technology
- Digital vs.Computed Radiography
The ongoing contest between digital radiography and computed radiography for first place in the digital imaging market continues to throw up new issues. Although both CR and DR improve workflow and productivity when compared to their non-digital predecessor, both have their own specific advantages and disadvantages and the main factor in choosing one system over another seems to come down to cost. Here we present a snapshot of some of the key pros and cons when choosing which system to implement, affecting areas such as productivity, cost-effectiveness, image quality and technologist productivity. Are the initial cost-savings of choosing CR over DR sensible when looking at a long-term productivity model?
Understanding the Differences Between Computed Radiography & Digital Radiography
To compare the differences between conventional radiography and digital computerized radiography CR in patients presenting to the emergency department. The study enrolled consecutive patients presenting to the emergency department who needed chest radiography. Quality score of the radiogram was assessed with visual analogue score VAS mm , measured in terms of millimeters and recorded at the end of study. Examination time, interpretation time, total time, and cost of radiograms were calculated. There were significant differences between conventional radiography and digital CR groups in terms of location unit Care Unit, Trauma, Resuscitation , hour of presentation, diagnosis group, examination time, interpretation time, and examination quality.
To evaluate the workflow efficiency between CR vs. On routine checkup Chest PA view erect position. The work flow steps of CR and wireless flatpanel DR system were identified, including examination preparation, patient positioning, exposure, post-acquisition processing and total examination time were recorded. We only included post-acquisition processing time because time from exposure to appearance of imaging is relatively fixed. The total time of procedure for CR system was
Digital vs.Computed Radiography
Digital radiography detector systems were first implemented for medical applications in the mid s, but the promise of digitalimaging was not realized until the early s, in conjunction with the establishment of first generation picture archiving and communications systems PACS. Atthe time, there was only one technology available to replace the analog screen-film detector-a cassette-based, passive acquisition photostimulable storage phosphor PSP and plate reader system, known as "computed radiography" CR. This system closely emulated the screen-film paradigm. Alternate technologies for digital image acquisition appeared in the mid s with the use of large field of view FOV X-ray phosphors and optical lens assemblies to focus the X-ray induced light output onto a small-area charge coupled device CCD photodetector array, as well as rectangular CCD arrays used with slot-scan geometries. Active-matrix flat-panel imager AMFPI systems appeared in the late s and early s, employing either an X-ray-to-light converter with photodiodearray, or a semiconductor material to directly convert incident X-rays into signals. Both CCD and flat-panel based detectors use an "active"readout of the image following acquisition to present the image immediately without further interaction by the technologist. Other technologies such as complementary metal-oxide semiconductor CMOS detectors were introduced in the same time frame as AMFPI's, but have not as of yet been successful, mainly due to problems with excessive electronic noise.
So, is there a clear winner in the CR vs. DR debate? Is one better for your office than the other? First, consider how these two types of systems actually function. Computed Radiography is a mechanical system, using analog technology to take X-ray exposures with CR cassettes in place of traditional film cassettes.
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Digital radiography: The bottom line comparison of CR and DR technology
When deciding how to modernize your practice with the use of digital radiography it is important that research be done into which way would be best for your clinic. In the choice between Computed Radiography and Digital Radiography you need to weigh the abilities of each, and the needs you wish to satisfy. Often considered the most initially cost friendly choice, CR is used almost exactly like conventional film, and so requires few changes to your office or workflow, and requires a smaller initial investment compared to DR devices of similar quality. CR systems also do not speed up your workflow in the same way as a DR panel and can require more maintenance. CR cassettes may additionally run the risk of getting damaged if improperly stored or handled, but are much cheaper to replace if dropped than a wireless DR panel.
Идти приходилось плечо к плечу, носок в пятку. У испанцев всегда было иное представление о плотности, чем у остального мира. Беккер оказался зажат между двумя полными женщинами с закрытыми глазами, предоставившими толпе нести их в собор. Они беззвучно молились, перебирая пальцами четки.
Digital vs.Computed Radiography
Я плачу вам за то, чтобы вы следили за отчетностью и обслуживали сотрудников, а не шпионили за моим заместителем. Если бы не он, мы бы до сих пор взламывали шифры с помощью карандаша и бумаги. А теперь уходите! - Он повернулся к Бринкерхоффу, с побледневшим лицом стоявшему возле двери. - Вы оба. - При всем моем уважении к вам, сэр, - сказала Мидж, - я бы порекомендовала послать в шифровалку бригаду службы безопасности - просто чтобы убедиться… - Ничего подобного мы делать не будем. На этом Мидж капитулировала: - Хорошо.
Сьюзан! - позвал. - Меня осенило. Здесь шестнадцать групп по четыре знака в каждой. - О, ради Бога, - пробурчал себе под нос Джабба. - Все хотят поиграть в эту игру. Сьюзан пропустила эти слова мимо ушей.
However, modern CR systems use plate readers that are integrated into the X-ray equipment itself, leaving little difference between CR and DR.