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My current research involves 3D iterative reconstruction of circular orbit cone-beam micro-CT data (X-ray computed tomography data, typically for small animal medical imaging). The iterative reconstruction algorithms generally take the form of solving very large sparse linear systems (for example, in a weighted least squares sense). For current data, the matrix in the linear system has over 100 billion non-zero elements and the resulting 3D image has dimensions 512x512x1022.

Publications:

First author

[1] T.M. Benson and J. Gregor, "Framework for Iterative Cone-Beam Micro-CT Reconstruction", in Proceedings of the 2004 IEEE Nuclear Science Symposium and Medical Imaging Conference, Rome, Italy, October 2004. Five pages.

[2] T. M. Benson and J. Gregor, "Distributed Iterative Image Reconstruction for Micro-CT with Ordered-Subsets and Focus of Attention Problem Reduction", Journal of X-ray Science and Technology, vol. 12, no. 4, pp. 231-240, Dec 2004.

[3] T. M. Benson and J. Gregor, "Distributed Image Reconstruction of Micro-CT Data: Computation and Communication Issues", in Proceedings of the International Conference on Communications in Computing, Las Vegas, Nevada, June 2005. Seven pages.

[4] T. M. Benson and J. Gregor, "Three-dimensional Focus of Attention for Iterative Cone-Beam Micro-CT Reconstruction", in Proceedings of the International Meeting on Fully Three-Dimensional Image Reconstruction in Radiology and Nuclear Medicine, Salt Lake City, Utah, July 2005. Four pages.

[5] T. M. Benson and J. Gregor, "Modified Simultaneous Iterative Reconstruction Technique for Faster Parallel Computation", in Proceedings of the 2005 IEEE Nuclear Science Symposium and Medical Imaging Conference, San Juan, Puerto Rico, October 2005. Four pages.

[6] T. M. Benson and J. Gregor, "Framework for Iterative Cone-Beam Micro-CT Reconstruction", IEEE Transactions on Nuclear Science, vol. 52, no. 5, pp. 1335-1340, Oct. 2005.

[7] T. M. Benson and J. Gregor, "Three-dimensional Focus of Attention for Iterative Cone-Beam Micro-CT Reconstruction", vol. 51, pp. 4533-4546, 2006.

[8] T. M. Benson and J. Gregor, "Iterative Reconstruction of Cone-Beam CT Data on a Cluster", in Proceedings of SPIE, vol. 6498, no. 1, San Jose, CA, 2007. Nine pages.

[9] T. M. Benson, W. Dixon, and S. Basu, "3D Filtered Backprojection for Curved Detector Axial Cone-Beam Data on a PlayStation ® 3", IEEE Nuclear Science Symposium Conference Record, vol. 5, pp. 3522-3525, 2007.

Co-author:

[1] J. Gregor, T. Benson, S. Gleason, and M. Paulus, "Support Algorithms for X-ray Micro-CT Conebeam Imaging", in Proceedings of the International Meeting on Fully Three-Dimensional Image Reconstruction in Radiology and Nuclear Medicine, Saint Malo, France, July 2003. Four pages.

[2] J. Gregor, T. Benson, S. Gleason, M. Paulus, S. Figueroa, T. Hoffman, S. Kennel, and J. Wall, "Approximate Volumetric System Models for microSPECT", IEEE Transactions on Nuclear Science, vol. 53, pp. 2646-2652, Oct. 2006.

[3] J. Gregor, T. Benson, and G. Bosilca, "Distributed Multi-Core Implementation of SIRT with Application to Cone-Beam Micro-CT", International Meeting on Fully 3D Image Reconstruction in Radiology and Nuclear Medicine, Lindau, Germany, July 2007. Four pages.

[4] M. Iatrou, B. De Man, K. Khare, T. M. Benson, "A 3D Study Comparing Filtered Backprojection, Weighted Least Squares, and Penalized Weighted Least Squares for CT Reconstruction", vol. 4, pp. 2639-2643, 2007.

[5] M. Iatrou, B. De Man, D. Beque, Z. Yin, K. Khare, and T. M. Benson, "3D Iterative Full and Half Scan Reconstruction in CT Architectures with Distributed Sources", Proceedings of SPIE, vol. 6913, San Diego, CA, Feb. 2008.

[6] J. Gregor and T. Benson, "Computational Analysis and Improvement of SIRT", IEEE Transactions on Medical Imaging, vol. 27, pp. 918-924, July 2008.
http://www.cs.utk.edu/~tbenson/research.php
Last modified: 29-Jan-2009 11:25:37 PM