1. A system ( 100 ) for alerting a user to a region of interest ( 260 ) within an image of interest ( 230 ), the image of interest being one of a sequence ( 200 ) of medical images from a patient, the system being configured for sequentially displaying the sequence of medical images for enabling the user to navigate through the sequence of medical images, and the system comprising: an input ( 110 ) for receiving a sequence navigation command from the user for requesting the system to display images from the sequence of medical images as part of pixel data shown on a display; and a signal generator ( 120 ) for providing a sensory signal to the user in separation from the pixel data and in dependence on a difference between a position ( 211 , 221 , 231 ) of a currently displayed image ( 210 , 220 , 230 ) of the sequence of medical images in the sequence and a position ( 231 ) of the image of interest ( 230 ) in the sequence.