Liang Hongzhu, Zhang Cishen, Yan Ming
Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore.
Conf Proc IEEE Eng Med Biol Soc. 2006;2006:2534-7. doi: 10.1109/IEMBS.2006.259791.
In this paper, a Feldkamp type approximate reconstruction algorithm is presented for helical cone-beam Computed Tomography. To effectively suppress artifacts due to large cone angle scanning, it is proposed to reconstruct the object point-wisely on unique customized tilted PI-planes which are close to the data collecting helices of the corresponding points. Such a reconstruction scheme can considerably suppress the artifacts in the cone-angle scanning. Computer simulations show that the proposed algorithm can provide improved imaging performance compared with the existing approximate cone-beam reconstruction algorithms.
本文提出了一种用于螺旋锥束计算机断层扫描的费尔德坎普（Feldkamp）型近似重建算法。为有效抑制大锥角扫描产生的伪影，建议在靠近相应点的数据采集螺旋线的独特定制倾斜PI平面上逐点重建物体。这种重建方案可以显著抑制锥角扫描中的伪影。计算机模拟表明，与现有的近似锥束重建算法相比，该算法能提供更好的成像性能。
