RONTGENUNDERSOKNINGSANORDNING INNEFATTANDE EN TELEVISIONSKANAL SOM HAR ETT MINNE

摘要

In an X-ray examining device comprising a television chain and an image recording memory, the deflection signals of the television pick-up tube and a drive of the recording memory are synchronized via the power supply mains. When the high voltage generator is switched on, inductive loading of the power supply mains occurs and the resultant phase shifts cause errors in the synchronization. This gives rise to the appearance of artifacts in a monitor image formed from the recording via the memory. Uncoupling of the synchronization from the power supply mains between an instant some time before and an instant some time after switching of the high voltage generator prevents the undesired recording errors.