Method and system for analyzing a stent deployed in a vessel The present invention provides a reliable automatic method for analyzing a deployed stent (60) in a vessel (10). The method involves determining and analyzing radial diameters (72) of the deployed stent (60) along the axial length of the stent (60) to detect an inadequate expansion using a digital medical image (70) of the deployed stent (60). On detecting the inadequate expansion an appropriate inflation diameter (78) of a balloon catheter (20) for correcting the inadequate expansion is identified.