一种用于使用扩展扫描螺旋的螺旋多层CT的费尔德坎普型近似算法。
A Feldkamp-type approximate algorithm for helical multislice CT using extended scanning helix.
作者信息
Liang Hongzhu, Zhang Cishen, Yan Ming
机构信息
School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 639798, Singapore.
出版信息
Comput Med Imaging Graph. 2009 Apr;33(3):197-204. doi: 10.1016/j.compmedimag.2008.12.003. Epub 2009 Jan 15.
In this paper, a Feldkamp-type approximate algorithm is proposed for helical multislice Computed Tomography (CT) image reconstruction. For reconstruction of practically required planar transversal image slices, the algorithm proposes a new short scan helical trajectory which satisfies Tuy's exact reconstruction condition. A planar slice reconstructed using this new trajectory has potential to be exactly reconstructed. This method improves the approximate helical reconstruction in terms of artifacts reduction and efficiency enhancement.
本文提出了一种用于螺旋多层计算机断层扫描（CT）图像重建的费尔德坎普型近似算法。为了重建实际所需的平面横向图像切片，该算法提出了一种满足图伊精确重建条件的新的短扫描螺旋轨迹。使用这种新轨迹重建的平面切片有可能被精确重建。该方法在减少伪影和提高效率方面改进了近似螺旋重建。
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