Three-Dimensional CT Image Reconstruction Techniques: Implementation and Comparison

摘要

High quality reconstructed images are a critical requirement in the field of medical imaging. Several attempts have been made by researchers to implement new techniques and to enhance present techniques. In this paper, we compared analytical (simple and filtered back projection) and iterative reconstruction techniques based on different performance parameters including signal to noise ratio (SNR), contrast to noise ratio (CNR), reconstruction error, and computation time. XCAT phantom, a three-dimensional body digital phantom was used for the study where images are reconstructed from projections sampled with different sampling rates. Results showed that iterative technique provided much better reconstructed images in comparison to analytical techniques with a drawback in terms of longer computation time.