1. A method for improving quality of an image, said method comprising: reconstructing a first image of a sample volume by performing a first image reconstruction method; generating a classifier using a computed tomography number of an image element within the first image; segmenting the first image into a first region and a second region using the generated classifier, wherein the first image reconstruction method is selected based at least in part on the computed tomography numbers of image elements within the first region; reconstructing a second image of the sample volume by performing a second image reconstruction method, wherein the second image reconstruction method is different than the first image reconstruction method and selected based at least in part on the computed tomography numbers of image elements within the second region; and generating a final image by combining the second image and one of the first region and the second region of the first image, the final image at least one of stored on a computer readable media, transmitted from a data acquisition system for further processing, and displayed to a user.