A method for acquiring image data in an imaging system comprising at least one radiation source and a detector responsive to radiation received from the radiation source, said method comprising: acquiring preliminary image data corresponding to at least a portion of an object; determining at least one parameter associated with the radiation source corresponding to a view angle of the radiation source and based on a priori information, the preliminary image data, or a combination thereof; determining at least one parameter associated with the detector corresponding to the view angle of the radiation source and based on the a priori information, the preliminary image data, or a combination thereof; characterised by: determining a flux in the detector corresponding to the view angle of the radiation source, by employing the preliminary image data; determining a predictive selection of operating modes for the radiation source and the detector to acquire imaging data corresponding to the at least a portion of the object, based on a stored correlation between parameters of the radiation source and the detector for different flux rates; selecting an operating mode of the radiation source and an operating mode of the detector corresponding to the view angle of the radiation source to achieve a desired system performance based upon said predictive selection of operating modes including switching the detector between a photon counting mode, an energy integration mode, or a combination thereof; and acquiring final image data corresponding to the at least a portion of the object using the selected operating modes of the radiation source and the selected operating modes of the detector. acquiring preliminary image data corresponding to at least a portion of an object; determining at least one parameter associated with the radiation source corresponding to a view angle of the radiation source and based on a priori information, the preliminary image data, or a combination thereof; determining at least one parameter associated with the detector corresponding to the view angle of the radiation source and based on the a priori information, the preliminary image data, or a combination thereof; characterised by: determining a flux in the detector corresponding to the view angle of the radiation source, by employing the preliminary image data; determining a predictive selection of operating modes for the radiation source and the detector to acquire imaging data corresponding to the at least a portion of the object, based on a stored correlation between parameters of the radiation source and the detector for different flux rates; selecting an operating mode of the radiation source and an operating mode of the detector corresponding to the view angle of the radiation source to achieve a desired system performance based upon said predictive selection of operating modes including switching the detector between a photon counting mode, an energy integration mode, or a combination thereof; and acquiring final image data corresponding to the at least a portion of the object using the selected operating modes of the radiation source and the selected operating modes of the detector. determining a flux in the detector corresponding to the view angle of the radiation source, by employing the preliminary image data; determining a predictive selection of operating modes for the radiation source and the detector to acquire imaging data corresponding to the at least a portion of the object, based on a stored correlation between parameters of the radiation source and the detector for different flux rates; selecting an operating mode of the radiation source and an operating mode of the detector corresponding to the view angle of the radiation source to achieve a desired system performance based upon said predictive selection of operating modes including switching the detector between a photon counting mode, an energy integration mode, or a combination thereof; and acquiring final image data corresponding to the at least a portion of the object using the selected operating modes of the radiation source and the selected operating modes of the detector.