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. Author manuscript; available in PMC: 2014 Apr 1.

Published in final edited form as: IEEE Trans Med Imaging. 2014 Mar;33(3):749–763. doi: 10.1109/TMI.2013.2295738

The images reconstructed by FBP (1^st row), ASD-POCS (2^nd row), AwTV-POCS (3^rd row) and TVS-POCS (4^th row) algorithms from 20 (left column), 40 (middle column), and 60 (right column) projection views in noise-free cases, respectively. The display window is [0, 0.0034] mm⁻¹ for the full field of view (FOV) images and is [0.0013, 0.0018] mm⁻¹ for the ROI images.