9 forms measurement values that are supplied to a computer 11 that via known methods calculates an image of the patient 3 that can in turn be reproduced on a monitor 12 connected with the computer 11 in the case of the present exemplary embodiment the data acquisition system 9 is connected to the radiation detector 4 with an electrical line 8 that in a manner not shown for example comprises a slip ring system or a wireless transmission path and to the computer 11 with an electrical line 10 the computer tomograph shown in fig1 can be used both for sequence scanning and for spiral scanning in the sequence scanning a slice by slice scanning of the patient 3 ensues the x ray source 1 and the radiation detector 4 are rotated around the patient 3 with regard to the system axis 6 and the measurement system comprising the x ray source 1 and the radiation detector 4 acquires a plurality of projections in order to scan a two dimensional slice of the patient 3 a slice image representing the scanned slice is reconstructed from the measurement values thereby acquired the patient 3 is respectively moved along the system axis 6 between the scanning of successive slices this event is repeated until all slices of interest are acquired during the spiral scan the x ray source 1 and the measurement system comprising radiation detector 4 move continuously in the direction of the arrow b relative to the system axis 6 and the table 7 i e the measurement system comprising the.