| 摘要 |
A device for computer tomography, comprising an X-ray source, a number of X-ray detectors and a signal processing network which includes a comparator for comparing detector output signals with data obtained during measurement of a calibration material and stored in a memory. The comparator determines, by way of interpolation, the thicknesses of calibration material which correspond to detector output signals and provides computer input signalswhich are a function of these thicknesses. By means of these computer input signals, an image of the density distribution of an irradiated patient is calculated. This image is free from interference patterns caused by differences between the detectors, by non-linearity of the detectors or by hardening of the radiation. |
