1. A method to evaluate a time series of images in a test bolus measurement, comprising the steps of: making a time series of two-dimensional evaluation images available to a processor, said time series of two dimensional evaluation images being selected from the group consisting of a series of two-dimensional images acquired from an examination subject beginning with administration of a contrast agent to the subject, and a derived time series of two-dimensional images derived from said time series of two-dimensional images; through said processor, at least semi-automatically determining at least one point representing a contrast agent signal associated with a blood vessel in at least one of said evaluation images, and transferring said at least one point to other evaluation images in said time series of two-dimensional evaluation images; in said processor, for each blood vessel having said at least one point associated therewith, automatically determining a plurality of constituents of a temporal contrast agent course curve, said constituents being selected from the group consisting of said at least one point in each of said at least one evaluation image and said other evaluation images, and a region around said at least one point in said at least one evaluation image and said other evaluation images, and automatically deriving said temporal contrast agent course curve from said constituents; and through said processor, determining, from said temporal contrast agent course curve, at least one item of contrast agent information that affects a temporal workflow of a subsequent examination of said examination subject using contrast agent.