1. A method comprising: collecting raw image data for a subject being imaged, wherein the subject being imaged comprises at least one structure; obtaining motion tracking data associated with the subject being imaged; receiving estimated complex deformation motion parameters relevant to the at least one structure; reconstructing an estimated image of the subject being imaged from the raw image data by modeling structure deformation motion of the at least one structure using the motion tracking data and the received complex deformation motion parameters; and indexing the obtained motion tracking data with the collected raw image data, wherein said reconstructing an estimated image includes utilizing the indexed data and complex deformation parameters to provide a 4D image reconstruction.