A Filtered Backprojection Algorithm for Triple-Source Helical Cone-Beam CT

作者：Zhao, Jun^*; Jin, Yannan; Lu, Yang; Wang, Ge

来源：IEEE Transactions on Medical Imaging, 2009, 28(3): 384-393.

DOI：10.1109/TMI.2008.2004817

• Computed tomography (CT)
• cone-beam
• filtered-backprojection (FBP)
• helical scanning
• triple-source

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.

• 出版日期2009-3
• 单位上海交通大学