17 October 2012 Imaging properties of circular and helical interlaced source-detector CT
Author Affiliations +
Proceedings Volume 8506, Developments in X-Ray Tomography VIII; 85061Q (2012); doi: 10.1117/12.929556
Event: SPIE Optical Engineering + Applications, 2012, San Diego, California, United States
We study reconstruction methods and imaging properties of the circular and helical interlaced source-detector array (ISDA) computed tomography (CT) system. The system uses carbon nanotube (CNT) based field emission X-ray source arrays and detector arrays. Distributed sources and detectors allow projection data been acquired from different direction by switching on the X-ray sources sequentially, requiring no rotation of gantry or object. Thus the system enables high temporal resolution and eliminates motion artifacts caused by gantry rotation as is common in the conventional CT systems. Interpolation is implemented to patch the absent data in the projection image, and tilted plane Feldkamp type reconstruction algorithm (TPFR) is used to reduce the cone beam artifacts for helical ISDA CT. We analyze the distribution of artifacts in the reconstruction, as well as the influence of the detector array gap and the helix pitch on reconstruction quality. Simulation studies demonstrate that the gap ratio is the key factor on the artifacts due to the gap, and increasing the pitch will reduced gap ratio. Choosing the helix pitch appropriately by getting a balance between cone beam artifacts and gap induced artifacts can get a better reconstruction.
© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Yi Chen, Yan Xi, Jun Zhao, "Imaging properties of circular and helical interlaced source-detector CT", Proc. SPIE 8506, Developments in X-Ray Tomography VIII, 85061Q (17 October 2012); doi: 10.1117/12.929556; https://doi.org/10.1117/12.929556

Reconstruction algorithms

X-ray computed tomography


X-ray sources

Image quality

Temporal resolution



Nonlinear problems in fast tomography
Proceedings of SPIE (September 25 2017)
Overview of multisource CT systems and methods
Proceedings of SPIE (September 20 2010)
A new CT architecture with stationary x-ray sources
Proceedings of SPIE (October 17 2012)

Back to Top