1. An image reconstruction method, comprising the acts of: acquiring a set of projection data at a plurality of views and time intervals with respect to an imaging volume; reconstructing a plurality of slices based on the set of projection data and a system matrix associated with the acquisition of the set of projection data; registering the slices to generate a plurality of transformation vectors describing a respective translation in three-dimensional space for each time interval during the acquisition of the set of projection data; determining one or more transformation vectors based on the act of registering the slices; generating an updated system matrix based on the one or more transformation vectors and the associated time intervals; and reconstructing a motion-corrected image using the updated system matrix.