MOTION COMPENSATION OF POSITRON EMISSION TOMOGRAPHIC DATA

Example embodiments describe a method for compensating motion in positron emission tomographic, PET, data comprising coincident lines of response from positron-emitting position markers, the method comprising: detecting a slippage of one or more of the position markers; determining slippage correction parameters based on the detected slippage; and applying motion correction to the PET data by taking into account the slippage correction parameters, thereby obtaining a motion-compensated PET data.