1. A method for acquiring dual-energy projection data, comprising: alternately emitting X-rays corresponding to a low kVp and a high kVp such that a corresponding set of low kVp projection data is acquired for each low kVp emission and a corresponding set of high kVp projection data is acquired for each high kVp emission, wherein the aggregate sets of low kVp projection data or high kVp projection data, when taken alone, do not provide full angular resolution but the combined sets of low kVp projection data and high kVp projection data provide full angular resolution; generating a mixed kVp image using the combined low kVp projection data and high kVp projection data; extracting a seed image based upon the mixed kVp image; updating the seed image to generate an updated image; reprojecting the updated image to generate density projections at full angular resolution; generating one or more of high kVp images, low kVp images, material decomposition images, or monochromatic images based at least in part on the generated density projections.