论文信息 - Algorithms For Limited-Angle Computed Tomography

Algorithms For Limited-Angle Computed Tomography

Limited-angle computed tomography was studied in a project to develop algorithms for a limited-angle scanner. Both the ART algorithm and an orthogonal function algorithm were investigated. The artifact produced by the different methods was very similar. A method is presented for producing model limited-angle artifact in phantom images. Filters are investigated for reducing the artifact, and it is shown that substantial improvement in subjective quality of images can be obtained. This method can be incorporated into limited-angle convolution back-projection algorithms.

Douglas P. Boyd | Douglas A. Ortendahl | William H. Rowan | John L. Couch

[1] Dennis L. Parker,et al. Sampling The Radon Transformation In Conventional Computed Tomography , 1981, Other Conferences.

[2] F. Grünbaum. A study of fourier space methods for “limited angle” image reconstruction * , 1980 .

[3] R. Marr,et al. On the reconstruction of a function on a circular domain from a sampling of its line integrals , 1974 .

[4] Alfred K. Louis. Orthogonal Function Series Expansions and the Null Space of the Radon Transform , 1984 .

[5] Alfred K. Louis,et al. Approximation of the Radon Transform from Samples in Limited Range , 1981 .

[6] A. Cormack. Representation of a Function by Its Line Integrals, with Some Radiological Applications , 1963 .

[7] M. E. Davison,et al. Convolution Algorithms for Arbitrary Projection Angles , 1979, IEEE Transactions on Nuclear Science.

[8] G. Herman,et al. Algebraic reconstruction techniques (ART) for three-dimensional electron microscopy and x-ray photography. , 1970, Journal of theoretical biology.

[9] B. Logan,et al. Optimal reconstruction of a function from its projections , 1975 .