Determination of X-ray tube current

Abstract

The invention relates to a computer-implemented method of determining a tube current during X-ray kVp switching. The method includes generating (110) a calibration tube voltage pulse during a calibration phase, wherein the calibration tube voltage pulse comprises a first kVp plateau and a second kVp plateau different from the first kVp plateau; measuring (120), during the calibration tube voltage pulse, a first tube current at the first kVp plateau and a second tube current at the second kVp plateau; determining (130) a calibration factor from a ratio between the first tube current and the second tube current; measuring (140) a third tube current at a steady state of the first kVp plateau during a kVp switching phase; and determining (150) a fourth tube current at the second kVp plateau during the kVp switching phase, wherein the fourth tube current is determined based on the calibration factor and the third tube current at the first kVp plateau. The invention also relates to a high voltage generator (30) configured to carry out the computer implemented method, a computer program element and a computer readable medium, and an X-ray system.

Dependencies are inferred from the claim text.