1. A method of assigning measurement data of a body of a patient, the measurement data having been accumulated by a first medical imaging system, to information data related to the body or vice versa, the method comprising: a) providing annotated measurement data to a number of measurement data regions, based on a first medical knowledge ontology, at least one measurement data finding being annotated in each of the measurement data regions, such that the measurement data regions together with the respective assigned measurement data findings form a first group of annotations, each of the measurement data findings representing a parameter value related to the corresponding measurement data region to which it is annotated; b) providing annotated information data to a number of information data regions, based on a second medical knowledge ontology, at least one information data finding being annotated in each of the information data regions, such that the information data regions together with respective assigned information data findings form a second group of annotations, each of the information data findings representing a parameter value related to the corresponding information data region to which it is annotated; c) translating the first group of annotations into a first group of universal annotations and the second group of annotations into a second group of universal medical annotations in a universal annotation ontology management system such that all universal annotations of the first group of annotations have the same ontological basis as all universal annotations of the second group of annotations; d) comparing the universal annotations of the first group of universal annotations with the universal annotations of the second group of universal annotations based on features related to at least one of parameter values in the findings and regions; and e) assigning the universal annotations to each other which have such common or similar features.