page_title: Radiography
section_title: Industrial radiography
hierarchical_section_title: Radiography / Industrial radiography
caption_attribution_description: Radiographs of the type specimen of Darwinius masillae, new genus and species, from Messel in Germany. Relative positions and museum numbers as in Figure 1. Radiographs show that all of plate A is genuine, while cranium, thorax, upper arms (part 1), and lumbus, pelvis, base of tail, and upper legs (part 2) of plate B are genuine.
context_page_description: 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 radiography and industrial radiography. Similar techniques are used in airport security. To create an image in conventional radiography, a beam of X-rays is produced by an X-ray generator and is projected toward the object. A certain amount of the X-rays or other radiation is 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. The generation of flat two dimensional images by this technique is called projectional radiography. In computed tomography an X-ray source and its associated detectors rotate around the subject which itself moves through the conical X-ray beam produced. Any given point within the subject is crossed from many directions by many different beams at different times.
context_section_description: Industrial radiography is a method of non-destructive testing where many types of manufactured components can be examined to verify the internal structure and integrity of the specimen.  Industrial Radiography can be performed utilizing either X-rays or gamma rays.  Both are forms of electromagnetic radiation.  The difference between various forms of electromagnetic energy is related to the wavelength.  X and gamma rays have the shortest wavelength and this property leads to the ability to penetrate, travel through, and exit various materials such as carbon steel and other metals. Specific methods include industrial computed tomography.
caption: Radiography may also be used in paleontology, such as for these radiographs of the Darwinius fossil Ida.
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