Radiology and Oncology

Computer assisted tomography

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This technique allows direct imaging of the living tissues by exposure to X rays. The absorption of x-rays by the patient’s body is measured by detectors and calculated in a slice-wise manner resulting in black-and-white images of the different x-ray densities of the tissues. A computed tomogram usually consists of a number of slices but 3D images can be calculated as well. In contrast to the conventional x-ray, bones and soft tissue organs can be presented without any superposition. The usually small differences in radiodensity between different tissues can be enhanced by injection of contrast medium.