Radiography

Uncommon card · No. 192040

Radiography is an imaging technique using X-rays, gamma rays, or similar ionizing radiation and non-ionizing radiation to view the internal form of an object. Applications of radiography include medical (diagnostic radiography and therapeutic radiography) and industrial radiography. Radiographic techniques are also used in airport security, where "body scanners" generally use backscatter X-ray. To create an image in conventional radiography, a beam of X-rays is produced by an X-ray generator and then projected towards the object. A certain amount of the X-rays or other radiation are absorbed by the object, dependent on the object's density and structural composition. The X-rays that pass through the object are captured behind the object by a detector (either photographic film or a digital detector). The generation of flat two-dimensional images by this technique is called projectional radiography. In computed tomography (CT scanning), an X-ray source and its associated detectors rotate...

Read on Wikipedia · Image Thomas Bjørkan, CC BY-SA 3.0