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Fast Feldkamp algorithm for cone-beam computer tomography

13 years 1 months ago
Fast Feldkamp algorithm for cone-beam computer tomography
We propose a new fast Feldkamp algorithm for 3-D cone beam tomography with a circular source trajectory. The algorithm is an extension of our recent fast native 2-D fan-beam reconstruction algorithm. It is based on a recursive hierarchical decomposition of the cone-beam backprojection operation into successively smaller sub-volumes. The algorithm reduces the computational complexity of the reconstruction from O(N4 ) to O(N3 log N). Simulations demonstrate the efficiency of our algorithm, with 7-fold speedup for a 128 ? 128 ? 128 image. image. Speedups will be much greater for images of more typical size encountered in medicine.
Shu Xiao, Yoram Bresler, David C. Munson Jr.
Added 24 Oct 2009
Updated 27 Oct 2009
Type Conference
Year 2003
Where ICIP
Authors Shu Xiao, Yoram Bresler, David C. Munson Jr.
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