15 September 2008 Investigation of helix-saddle trajectories for cone-beam CT
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Abstract
In this paper, a hybrid helix-saddle trajectory scanning mode is proposed for bolus-chasing CT angiography. By combining the conventional helical trajectory and saddle trajectory appropriately, an optimal curve can be obtained with a capability of localized volumetric imaging at desirable locations. In this context, a condition for the PI-line existence is determined. Then, both filtered-backprojection (FBP), backprojection filtration (BPF) and reduced-scan FBP algorithms are developed. Numerical studies with the 3D Shepp-Logan phantom support the validity and merits of the proposed trajectories and associated algorithms.
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Yang Lu, Yang Lu, Jun Zhao, Jun Zhao, Erwei Bai, Erwei Bai, Ge Wang, Ge Wang, "Investigation of helix-saddle trajectories for cone-beam CT", Proc. SPIE 7078, Developments in X-Ray Tomography VI, 70780I (15 September 2008); doi: 10.1117/12.793728; https://doi.org/10.1117/12.793728
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