Method for operating a ct imaging system

Abstract

The invention provides a method for operating a CT imaging system comprising a gantry having a detector and a rotary encoder attached to the gantry. The method comprises modelling, by means of an adaptive digital phase-locked loop, A-DPLL, a gantry rotation of the gantry, the A-DPLL configured to minimize the difference between an actual gantry angle and a modeled gantry angle, and generating, for each of a plurality of predetermined values of the modeled gantry angle, a trigger pulse for the detector. The actual gantry angle is obtained by detecting a gantry angle by means of the rotary encoder and adapting the detected gantry angle to account for a deviation of the actual rotary encoder characteristics from expected rotary encoder characteristics, the adapting being performed using an angular pattern of the rotary encoder.

Dependencies are inferred from the claim text.