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Computed tomography
The first computed tomography devices were put into operation around 1972. Unlike conventional X-ray, the use of a computer is absolutely necessary.
The area to be diagnosed is X-rayed from various orientations. From raw data, the computed tomograph (CT) generates sectional images in the desired orientations. CT images afford excellent soft-tissue contrast. Different types of tissue can thus be well separated from each other. Although CT was considered revolutionary in the 1970s, it has largely been replaced by MRI (magnetic resonance technology).