A system for visualizing vascular fluid flow concentration includes at least one repository including a plurality of stored angiography scenes, an angiography scene comprises a plurality of individual images of a vascular structure successively acquired over a time period. A user interface control device enables a user to determine, (a) a duration and (b) a start time relative to a start time of the time period, of a window of interest within the time period. A control processor is electrically coupled to the user interface control device and the at least one repository. Control processor automatically assigns a unique visual indicator representing contrast flow of fluid through vessels to individual images within the user determined duration of the time period. A display processor, electrically coupled to the control processor and the user interface control device and at least one repository, generates data representing at least one display image comprising a composite image including individual images within the user determined duration of the time period having a unique assigned visual indicator.