Radiography means a technique for generating and recording an x-ray pattern for the purpose of providing the user with an image(s) after termination of the exposure.
Computed tomography means the production of a tomogram by the acquisition and computer processing of X-ray transmission data.
Cabinet radiography means industrial radiography conducted in an enclosure or cabinet shielded so that radiation levels at every location on the exterior meet the limitations specified in 641—40.26(136C).
Permanent radiographic installation means an enclosed shielded room, cell, or vault, not located at a temporary jobsite, in which radiography is performed.
Industrial radiography means an examination of the structure of materials by the nondestructive method of utilizing ionizing radiation to make radiographic images.