
A CAT (computerized axial tomography) scanner having a lightweight rotary portion. The scanner has slip rings through which electric power is supplied to an x-ray tube. The slip rings do not need any special insulating mechanism. The scanner includes an inverter (3) for converting a line voltage into an AC voltage between the line voltage and a high voltage applied to the x-ray tube. The frequency of the AC voltage is between the frequency of the line voltage and radio frequencies. This AC volta...











