What are digital x rays?

It is an xray that is taken by a computer. Normal x-rays are taken when X radiation passes through you body and reaches a x-ray cassette with film in it. The more dense areas of the body (bones) absorb the x radiation and keep them from hitting the film (called partial absorbtion) thus the bone are lighter white color. Areas such a lungs which have air in them are not as dense as bone and do not absorb x rays thus they are black on film. Other areas with densitys between bone and lung (air) will result in different levels of grays. The film is exposed by the xrays that are not absorbed and partly absorbed by the body. Also it is key to note the xray cassette that hold the film has a screen inside it that is emits a light when hit with xrays. It actually the screen lighting up that exposes the film, which in turn is developed into the traditional xray film. In digital xray there is no film. The xrays expose a photo cell that is connected to a computer. Thus connected to a display. The nice thing about a digital xray is you can adjust the black and gray levels and send the image over the internet to radiologists all over the world. Hope this helps. Do take note that digital x-ray always to be confused with the x-ray radiation as being 'digital'. The fact is only image acquisition is digital and there is so such thing as digital x radiation.