Iterative circular conebeam CT reconstruction using fast hierarchical backprojection/reprojection operators

Jeffrey Brokish; Daniel B. Keesing; Yoram Bresler

doi:10.1117/12.844026

22 March 2010 Iterative circular conebeam CT reconstruction using fast hierarchical backprojection/reprojection operators

Jeffrey Brokish, Daniel B. Keesing, Yoram Bresler

Author Affiliations +

Proceedings Volume 7622, Medical Imaging 2010: Physics of Medical Imaging; 76221R (2010) https://doi.org/10.1117/12.844026
Event: SPIE Medical Imaging, 2010, San Diego, California, United States

Abstract

This is the first report on a new fast statistical iterative reconstruction algorithm for conebeam with a circular source trajectory, accelerated by InstaRecon's fast O(N³logN) hierarchical cone beam backprojection1 and reprojection algorithms. We report on the results of image quality and run-time comparisons with iterative algorithms based on conventional backprojection and reprojection. We demonstrate that the iterative algorithm introduced here can provide image quality indistinguishable from an iterative algorithm using conventional BP/RP operators, while providing almost a 10x speedup in reconstruction rates. Combining the 10x algorithmic acceleration with additional hardware acceleration by FPGA, Cell, or GPU implementation, this work indicates the feasibility of iterative reconstruction algorithms for dose reduction and image quality improvement in routine CT practice, at competitive speeds and affordable cost.

Citation Download Citation

Jeffrey Brokish, Daniel B. Keesing, and Yoram Bresler "Iterative circular conebeam CT reconstruction using fast hierarchical backprojection/reprojection operators", Proc. SPIE 7622, Medical Imaging 2010: Physics of Medical Imaging, 76221R (22 March 2010); https://doi.org/10.1117/12.844026

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