Zhao Jun, Jin Yannan, Lu Yang, Wang Ge
Department of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China.
IEEE Trans Med Imaging. 2009 Mar;28(3):384-93. doi: 10.1109/TMI.2008.2004817.
Multisource cone-beam computed tomography (CT) is an attractive approach of choice for superior temporal resolution, which is critically important for cardiac imaging and contrast enhanced studies. In this paper, we present a filtered-backprojection (FBP) algorithm for triple-source helical cone-beam CT. The algorithm is both exact and efficient. It utilizes data from three inter-helix PI-arcs associated with the inter-helix PI-lines and the minimum detection windows defined for the triple-source configuration. The proof of the formula is based on the geometric relations specific to triple-source helical cone-beam scanning. Simulation results demonstrate the validity of the reconstruction algorithm. This algorithm is also extended to a multisource version for (2N + 1)-source helical cone-beam CT. With parallel computing, the proposed FBP algorithms can be significantly faster than our previously published multisource backprojection-filtration algorithms. Thus, the FBP algorithms are promising in applications of triple-source helical cone-beam CT.
多源锥束计算机断层扫描（CT）是一种具有吸引力的选择方法，因其具有卓越的时间分辨率，这对心脏成像和对比增强研究至关重要。在本文中，我们提出了一种用于三源螺旋锥束CT的滤波反投影（FBP）算法。该算法既精确又高效。它利用了与螺旋间PI线相关的三个螺旋间PI弧以及为三源配置定义的最小检测窗口中的数据。公式的证明基于三源螺旋锥束扫描特有的几何关系。模拟结果证明了重建算法的有效性。该算法还扩展到了用于（2N + 1）源螺旋锥束CT的多源版本。通过并行计算，所提出的FBP算法可比我们之前发表的多源反投影滤波算法显著更快。因此，FBP算法在三源螺旋锥束CT的应用中很有前景。
