[1] [1] Horn B K P. Fan-Beam Reconstruction Methods[J]. IEEE, 1979, 67: 1616-1623.

[2] [2] Herman G T. Image reconstruction from projection: the fundamentals of computed tomography[M]. New York: Academic Press, 1980.

[4] [4] Kowalski G. Suppression of ring artifacts in CT fan-beam scanners[J]. IEEE Trans On Nucl Sci, 1978,NS 25(5): 1111-1116.

[7] [7] Jiang Hesieh. Reconstruction Bias Resulting from Weighted Projection and Iso-center Misalignment[J]. SPIE, 1999, 3661: 442-449.

[8] [8] Davis G R, Elliott J C. X-ray Microtomography Scanner Using Time-delay Integration For Elimination of Ring Artifacts in the Reconstructed Image[J]. Nucl. Instr. And Meth. in Phys.Res. A, 1998, 402:683-687.