X-Ray diagnostic system comprising a radiographic unit with an x-ray tube which can emit a fan-shaped radiation beam

An x-ray diagnostic system comprising a radiographic unit with an x-ray source which emits a fan-shaped radiation beam;

• a support for a radiography subject a radiation detector for reception of the radiation emerging from the radiography subject, said detector supplying electric output signals corresponding to the received radiation profile;
• scanning means for producing a relative scanning movement between the support for the radiography subject and the radiation beam;
• and a measured value processing and display unit for receiving the detector output signals, and for determining and reproducing an x-ray shadow image corresponding to the scanning movement, said scanning means producing a rotational scanning movement about an axis (12), which passes through the focus of the x-ray tube (1) and the radiation detector (4), the measured value processing and display unit being operable for effecting a polar coordinate display wherein a number of concentric image point circles are recorded, each of which is allocated to a specific detector location of the radiation detector (4) and is modulated in its intensity corresponding to the output signal of the radiation detector (4) at this detector location, and means (13) coupled with said scanning means and with said processing and display unit for synchronization of the recording operation with the rotational movement, so that the circles are completely recorded when a scanning movement is terminated.