Computed tomography (CT) is the largest contributor to medical radiation dose patients receive.
Tomography is sectional imaging or sectioning that uses a penetrating wave of any kind. The technique is employed in a variety of scientific fields, including astronomy, plasma physics, materials science, biology, archaeology, radiography, and quantum information. Tomos, which means "slice, part," and graph, which means "to write" or, in this case, "to describe," are the roots of the word tomography. Tomographs are the tools used in tomography, and tomograms are the images they produce.
The creation of these images frequently relies on the mathematical technique of tomographic reconstruction, such as when X-ray computed tomography is produced technically from several projectional radiographs.
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