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Proceedings Paper

Overview of multisource CT systems and methods
Author(s): Jun Zhao; Yang Lu; Tiange Zhuang; Ge Wang
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Paper Abstract

Multiple-source cone-beam scanning is a promising mode for dynamic volumetric CT/micro-CT. The first dynamic CT system is the Dynamic Spatial Reconstructor (DSR) built in 1979. The pursuance for higher temporal resolution has largely driven the development of CT technology, and recently led to the emergence of Siemens dual-source CT scanner. Given the impact and limitation of dual-source cardiac CT, triple-source cone-beam CT seems a natural extension for future cardiac CT. Our work shows that trinity (triple-source architecture) is superior to duality (dual-source architecture) for helical cone-beam CT in terms of exact reconstruction. In particular, a triple-source helical scan allows a perfect mosaic of longitudinally truncated cone-beam data to satisfy the Orlov condition and yields better noise performance than the dual-source counterpart. In the (2N+1)-source helical CT case, the more sources, the higher temporal resolution. In the N-source saddle CT case, a triple-source scan offers the best temporal resolution for continuous dynamic exact reconstruction of a central volume. The recently developed multi-source cone-beam algorithms include an exact backprojection-filtration (BPF) approach and a "slow" exact filtered-backprojection (FBP) algorithm for (2N+1)-source helical CT, two fast quasi-exact FBP algorithms for triple-source helical CT, as well as a fast exact FBP algorithm for triple-source saddle CT. Some latest ideas will be also discussed, such as multi-source interior tomography and multi-beam field-emission x-ray CT.

Paper Details

Date Published: 20 September 2010
PDF: 14 pages
Proc. SPIE 7804, Developments in X-Ray Tomography VII, 78040H (20 September 2010); doi: 10.1117/12.860307
Show Author Affiliations
Jun Zhao, Shanghai Jiao Tong Univ. (China)
Yang Lu, Shanghai Jiao Tong Univ. (China)
Tiange Zhuang, Shanghai Jiao Tong Univ. (China)
Ge Wang, Virginia Polytechnic Institute and State Univ. (United States)

Published in SPIE Proceedings Vol. 7804:
Developments in X-Ray Tomography VII
Stuart R. Stock, Editor(s)

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