Affiliations: Department of Biomedical Engineering, Shanghai Jiao
Tong University, Shanghai, 200030, China. E-mail: [email protected];
[email protected] | LMAM, School of Mathematical Sciences, Peking
University, Beijing 100871, China. E-mail: [email protected] | Department of Radiology, University of Iowa, Iowa
City, IA 52242, USA. E-mail: [email protected]
Note: [] Corresponding author
Abstract: For dynamic CT reconstruction, we have conceptualized a
triple-source helical cone-beam scanning mode, and formulated a
backprojected-filtration (BPF) algorithm for exact image reconstruction. The
algorithm uses data from the three inter-helix PI-arcs related to the
inter-helix PI-lines and the minimum detection windows defined for the
triple-source configuration. The proof of the formula is based on Tuy's
inversion formula and the geometric relations of inter-helix PI-lines.
Simulation results demonstrate the validity of the reconstruction algorithm.
The BPF algorithm is also extended for the (2N+1)-source
helical cone-beam CT.
