Abstract: The present invention relates to a method for assisting a user in determining a medical condition in a subject from one or more medical images by presenting the user with a list of questions, LOQ, about the subject that are to be answered with an affirmative indication (Y), a negative indication (N) or an unknown indication (X) by input by the user. In response to receiving an answer to one question, the method presents the user with a ranked list of conditions, LOC, and also with an updated LOQ wherein at least the answered question has been removed i.e. the LOQ iteratively collapses or reduces in length. An earlier step of selecting a foundation observation, FO, about the subject reduces the initial LOQ and the possible conditions.