1. An X-ray imaging system providing enhanced image feature visualization, comprising: at least one repository of data representing a sequence of X-ray images of a portion of patient anatomy acquired over a time interval and signal data representing electrical activity of the heart of the patient over the time interval; and an image data processor for, determining, for each image of said sequence of X-ray images, a maximum value and a minimum value of a portion of said signal data associated with the image, calculating, for each image of said sequence of X-ray images, an average value based on the maximum value and the minimum value of the portion of said signal data associated with the image, selecting a set of images from said sequence of X-ray images by comparing said average value of a particular image with the average values of said sequence of X-ray images and excluding said particular image from said set of images in response to a determination that said average value of said particular image is insufficiently close to said average values of said sequence of X-ray images, the set of images excluding one or more images of said sequence of X-ray images, and generating a generated image from said set of images.