1. A method for screening a cargo container, said method comprising: a) receiving an image signal associated with the cargo container, the image signal conveying information related to contents of the cargo container; b) receiving a list of objects conveying objects expected to be present in the cargo container; c) processing the image signal associated with the cargo container in combination with said list of objects and a group of target images associated with objects to derive mismatch information data, said mismatch information data conveying at least one distinction between the list of objects and the information related to the contents of the cargo container conveyed by the image signal; d) releasing information conveying the mismatch information data.