Department of Elec. and Comp. Engineering, Beijing Union University, Beijing 100101, China.
J Xray Sci Technol. 2001 Jan 1;9(3):113-20.
The cone-beam approach for image reconstruction attracts an increasing attention in various applications, especially medical imaging. Previously, the traditional practical cone-beam reconstruction method, the Feldkamp algorithm, was generalized into the case of spiral/helical scanning loci with equispatial cone-beam projection data. In this paper, we formulated the generalized Feldkamp algorithm in the case of equiangular cone-beam projection data, and performed numerical simulation to evaluate the image quality. Because medical multi-slice/cone-beam CT scanners typically use equiangular projection data, our new formula may be useful in this area as a framework for further refinement and a benchmark for comparison.
锥形束成像重建方法在各种应用中受到越来越多的关注，特别是在医学成像领域。以前，传统的实用锥形束重建方法，即 Feldkamp 算法，已经被推广到具有等空间锥形束投影数据的螺旋/螺旋扫描轨迹的情况。在本文中，我们在等角锥形束投影数据的情况下推导出了广义 Feldkamp 算法，并进行了数值模拟以评估图像质量。由于医疗多切片/锥形束 CT 扫描仪通常使用等角投影数据，因此我们的新公式可能在该领域作为进一步改进的框架和比较的基准有用。
