A hierarchical algorithm for fast backprojection in helical cone-beam tomography

被引：0
|
作者：
Bresler, Y [1 ]
Brokish, J
机构：
[1] Univ Illinois, Coordinated Sci Lab, Urbana, IL 61801 USA
[2] Univ Illinois, Dept Elect & Comp Engn, Urbana, IL 61801 USA
来源：
2004 2ND IEEE INTERNATIONAL SYMPOSIUM ON BIOMEDICAL IMAGING: MACRO TO NANO, VOLS 1 AND 2 | 2004年
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D O I：
暂无
中图分类号：
O42 [声学];
学科分类号：
070206 ; 082403 ;
摘要：
Existing algorithms for exact helical cone beam (HCB) tomographic reconstruction involve a 3-D backprojection step, which dominates the the computational cost of the algorithm. We present a fast hierarchical 3-D backprojection algorithm, generalizing fast 2-D parallel beam and fan beam algorithms, which reduces the complexity of this step from O(N-4) to O(N-3 log N), greatly accelerating the reconstruction process.
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页码：1420 / 1423
页数：4
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