One of the mysteries of the English language finally explained.
computed tomography1
noun
mass nounMedicineA form of tomography in which a computer controls the motion of the X-ray source and detectors, processes the data, and produces the image.
computed tomography2
noun
mass nounMedicineA form of tomography in which a computer controls the motion of the X-ray source and detectors, processes the data, and produces the image; also called computed axial tomography, computerized (axial) tomography; abbreviated CT.
Origin
1970s; earliest use found in Radiology.