A device package that receives a voltage from a power supply on a motherboard and that includes provisions for a voltage control element that controls the power supply voltage. It controls the X-ray arrangement such that, respectively at a plurality of angular positions at recording times, projections of an object to be examined arranged in the region of the pivot axis and moving iteratively are detected and supplied to the control device, which stores the projections and the corresponding angular positions. In the second stage the image frame is compared with the short list of codebook patches by any desired method, e. The orienting member is positioned at the inner side of an orienting rail, which guides the orienting member to move in a fixed direction so as to make the transparent films move smoothly.