1. A method for producing enhanced computed tomography (CT) images, the method comprising the steps of: (a) acquiring a series of energy data sets, each energy data set associated with at least one energy bin of an energy spectrum; (b) reconstructing, using a computer system, a series of energy images using the series of energy data sets; (c) generating, using the computer system, a conglomerate image using a combination of the series of energy images; and (d) generating, using the conglomerate image, the time series of energy images and a model, at least one of an enhanced image and an enhanced material-specific image, wherein the model is configured such that a noise variance of the at least one of the enhanced image and the enhanced material-specific image is substantially determined by the conglomerate image.