Method for identifying error caused due to plate shock in X-ray tube of computer tomograph, involves deriving measure of strength of plate shock of rotating anode of X-ray tube from spectral selective fluctuation of exposure intensity

摘要

The method involves detecting exposure intensity (B) in detector lines (13a, 13b) in a time-resolved manner while performing a test measurement i.e. empty measurement, by using a computer tomograph (1). Spectral selective fluctuation of the detected intensity with rotating anode frequency and/or integral multiples of the anode frequency is determined. Measure of strength of plate shock of a rotating anode (10) of an X-ray tube (2) of the tomograph is derived from the fluctuation. An error is identified to be caused due to plate shock when the fluctuation exceeds a threshold value. An independent claim is also included for a computer tomograph.