Tomography is imaging by sections or sectioning.
A device used in tomography is called a tomograph, while the image produced is a tomogram.
A tomography of several sections of the body is known as a polytomography.
In conventional medical X-ray tomography, clinical staff make a sectional image through a body by moving an X-ray source and the film in opposite directions during the exposure.
In most cases it is based on the mathematical procedure called tomographic reconstruction.
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