A method performed by a data processing system of registering patient-related data, the method including receiving, from a registration device, a set of identification data items and one or more identification time stamps, wherein each identification time stamp is associated with at least one of the identification data items, and the set of identification data items comprises a device identification data item identifying an electronic device and a patient identification data item identifying a patient; receiving, from the electronic device, patient-related data to be registered and an acquisition time stamp indicative of an acquisition time at which the patient-related data has been acquired; and associating the received patient-related data with an identified patient based on at least the received device identification data item, the received patient identification data item, the received one or more identification time stamps and the received acquisition time stamp.