1. A system for acquisition and co-registered display of intravascular information, comprising: an imaging flexible elongate member having a proximal end and a distal end; an imaging probe located near the distal end of the flexible elongate member, and configured to obtain information for generating an image of a vessel; a radiopaque marker located near the imaging probe; a first memory for storing angiogram image data; a second memory for storing intravascular image data derived from information obtained by the imaging probe; a display processor that combines data retrieved from the first memory and second memory to render a composite image including: an enhanced radiological image derived from the angiogram image data, and an intravascular image element corresponding to the intravascular image data, wherein the enhanced radiological image and the intravascular image element are displayed proximate each other; and a cursor, displayed upon the enhanced radiological image, indicative of a location of the imaging probe while acquiring data for the intravascular image element, said cursor having a position that is based at least in part on third data derived from the radiopaque marker.