Digital fluoroscopy uses a controlled beam of energy that is passed through the body and captured by an image detector. Because the bones, organs and tissues within our bodies are composed of differing densities, the beams move through them differently. Bones for instance will absorb more of the beam than an organ or soft tissue making them appear white or gray on the image while the tissue appears darker.
The image information passes through a one-million pixel camera where it is digitized and sent to the computer. The conversion is immediate and yields a high resolution digital image that we can view much like a movie of what is happening inside the body.
Sometimes digital fluoroscopy makes use of a contrast agent like barium. These agents are radio-opaque liquids which provide a white appearance on the fluoroscopic image. As the agent moves through the exam area, generally an organ, the radiologist is able to track its path and evaluate the organ as it functions as well as size and location.
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