subject: A Better Understanding Of How A Digital X Ray Works [print this page] A digital x ray makes use of digital x-ray sensors other than photographic films that provided a lot of limitations. A high definition camera is used to take the images and print them out immediately for the physician to make an analysis. The process is much faster because it does not involve the chemical process that is a necessity in analog radiography since it is the only way to finally get the image.
The mode of capturing the images can differ but they all work towards the same results. In the first method, a high density solid state detector is used alongside a laser diode. The photostimulable phosphor detector is used to record the amount of energy contained in trapped electrons.
The trapped electrons form a latent image. To get a clearer image, the phosphor is illuminated by use of the laser diode which displays the pattern formed by the trapped electrons. The image is then read by CCD image capture arrays. It is not possible to get instant images because the cassette has to be taken to a laser scanner which uses a photomultiplier to digitize the images.
To get an instant image via the phosphor method, a video camera that has been optically coupled to the image intensifier is used. The signal from the video camera is digitized and displayed on the image intensifier through a phosphor screen that has not been stimulated. The file can then be sent to a networked computer for better display.
The other system makes use of amorphous selenium flat panel detector. The photons are converted to charge carriers directly. The outermost layer of the photoconductive flat panel behaves like a high voltage electrode which determines the rate of holes replacement by electrons in the amorphous selenium. A very high resolution image is then acquired by digitizing the electrical signals.
Digital radiography has brought a lot of advantages. The images are usually of high quality because of the high resolution cameras used. A lot of time is saved because the images are acquired instantly. It is also possible to get an image with certain specifications like zoom.
The process costs much less compared to analog radiography. The image files can be shared remotely through networked computers. It is now common to find a digital x-ray in many medical institutions. Dentists have found much use for it. If in need of one, buy it from known sources and ensure that it meets international standards.
