Definition - What does Radiography mean?
Radiography is the creation of photographs of an object by using a form of radiation other than visible light. Radiography can be used to identify and qualitatively describe an object's internal material defects that were caused by corrosion or degradation.
Corrosionpedia explains Radiography
Radiographic testing typically uses wavelengths in the x-ray and gamma ray portions of the light spectrum, which possess significantly higher energy levels than other wavelengths.
To generate an image with radiographic testing, the object to be examined is placed between the radiation source and a film. The object's density and thickness differences reduce the penetrating radiation through interaction (scattering, dissolution and absorption).
Radiographic testing uses various processes to display the final image. Some of these inspection processes are film radiography, real time radiography (RTR), computed tomography (CT) and digital radiography (DR).