Conventional and Newer Reconstruction Techniques in CT

Heightened concerns over increasing radiation dose from CT scanning have highlighted limitations of real-time image reconstruction methods using conventional filtered back-projection techniques. Significant advances in computational power have enabled commercial availability of several iterative approaches for CT image reconstruction and processing. These techniques enable radiation dose reduction, as well as opportunity to improve scanner resolution, while reducing some image artifacts. In this chapter, we review the technical basis of conventional and newer reconstruction techniques for CT.