A system for identifying a particular data object of a data type in a database comprising data objects of the data type, wherein the data objects are medical data objects (206, 207, 501), the system comprises: - a query composition unit for composing a search query to identify a candidate data object (206, 207,501) being a candidate for the particular data object, - a search unit for identifying, based on the search query, the candidate data object (206, 207, 501) in the database, a segment proposal unit for proposing a set of candidate segments (401, 403, 504, 505, 506) being segments of the candidate object, wherein the segment proposal unit is arranged for proposing the set of candidate segments (401, 402) based on anatomically defined parts of a body, - a presentation unit for presenting the candidate data object (206, 207, 501) to the user, - a feedback receiving unit for receiving user feedback on the relevance or irrelevance of a candidate segment (401, 402, 504, 505, 506) from the proposed set of candidate segments of the candidate data object (206, 207, 501), wherein the feedback receiving unit is constructed for receiving user feedback on the relevance or irrelevance of a feature of a content of the candidate segment (401, 402, 504, 505, 506) of the candidate data object (206, 207, 501), - the search unit being further constructed for identifying an improved candidate data object in response to the received user feedback, wherein the identifying the improved candidate data object is performed by updating the search query in response to the received user feedback and by identifying the improved candidate data object based on the updated search query; and wherein the improved candidate data object is an improved candidate for the particular data object. - a query composition unit for composing a search query to identify a candidate data object (206, 207,501) being a candidate for the particular data object, - a search unit for identifying, based on the search query, the candidate data object (206, 207, 501) in the database, a segment proposal unit for proposing a set of candidate segments (401, 403, 504, 505, 506) being segments of the candidate object, wherein the segment proposal unit is arranged for proposing the set of candidate segments (401, 402) based on anatomically defined parts of a body, - a presentation unit for presenting the candidate data object (206, 207, 501) to the user, - a feedback receiving unit for receiving user feedback on the relevance or irrelevance of a candidate segment (401, 402, 504, 505, 506) from the proposed set of candidate segments of the candidate data object (206, 207, 501), wherein the feedback receiving unit is constructed for receiving user feedback on the relevance or irrelevance of a feature of a content of the candidate segment (401, 402, 504, 505, 506) of the candidate data object (206, 207, 501), - the search unit being further constructed for identifying an improved candidate data object in response to the received user feedback, wherein the identifying the improved candidate data object is performed by updating the search query in response to the received user feedback and by identifying the improved candidate data object based on the updated search query; and wherein the improved candidate data object is an improved candidate for the particular data object.