1. A computed tomography method for forming a scannogram by means of a computed tomography apparatus which includes a scanning unit for the acquisition of measured values that is rotatable about an axis of rotation and is provided with a radiation source and a detector unit, a relative motion which includes a displacement in the direction parallel to the axis of rotation taking place between the scanning unit and an examination zone during an acquisition of measured values, followed by the extraction of a scannogram from the measured values, characterized in that the method includes the following steps: rotating the scanning unit about the axis of rotation during the acquisition of the measured values, reconstructing from the mesured values a 3D data set which is three-dimensionally dependent on the attenuation of the radiation in the examination zone covered by the scanning unit, calculating at least one synthetic projection image from the 3D data set.