Helical FDK algorithms with no backprojection weight
Helical FDK algorithms with no backprojection weight
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无反投影权重的螺旋 FDK 算法
DOI：
10.1109/tencon.2009.5395953
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发表时间：
2009
期刊：
影响因子：
--
通讯作者：
K. Rajgopal
中科院分区：
文献类型：
--
作者：
A. V. Narasimhadhan;K. Rajgopal
在本文中，我们提出了两个新的过滤反投影（FBP）型算法的圆柱探测器螺旋锥束几何形状与位置无关的反投影权重。该算法是最近的精确希尔伯特滤波为基础的2D发散束重建没有反投影权重的FDK型算法在3D螺旋轨迹锥束层析重建的扩展。HFDK-W1和HFDK-W2两种算法可获得更好的图像质量、噪声均匀性、更低的噪声和减少的锥束伪影。
In this paper, we present two new filtered back-projection (FBP) type algorithms for cylindrical detector helical cone-beam geometry with no position dependent backprojection weight. The algorithms are extension of the recent exact Hilbert filtering based 2D divergent beam reconstruction with no back-projection weight to the FDK type algorithm for reconstruction in 3D helical trajectory cone-beam tomography. The two algorithms named HFDK-W1 and HFDK-W2 result in better image quality, noise uniformity, lower noise and reduced cone-beam artifacts.