Tomography is imaging by sections or sectioning that uses any kind of
penetrating wave. The method is used in radiology, archaeology, biology,
atmospheric science, geophysics, oceanography, plasma physics, materials
science, cosmochemistry, astrophysics, quantum information, and other areas of
science. The word tomography is derived from Ancient Greek τόμος tomos ,
"slice, section" and γράφω graphō , "to write" or, in this context as well,
"to describe." A device used in tomography is called a tomograph , while
the image produced is a tomogram.