A method for use in a medical viewing system for processing for display a sequence of images of a medical intervention comprising manipulating a tool such as a stent (25) within an artery. Two markers (21, 22) are provided on the tool support (10) and the method includes extracting these markers (21, 22) to yield marker location information, from which tool location information can be derived. The image of the tool within the sequence of images is then enhanced relative to the background. The background can be additionally blurred by simulating or effecting relative movement of the image detector and the stent (25) by, for example, zooming in on the stent (25) or rotating the detector relative thereto, during acquisition of the sequence of images.