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. 2016 Feb:9783:978312.
doi: 10.1117/12.2217446. Epub 2016 Mar 22.

Dual-Source Multi-Energy CT with Triple or Quadruple X-ray Beams

Lifeng Yu  1 , Shuai Leng  1 , Cynthia H McCollough  1
Affiliations

Dual-Source Multi-Energy CT with Triple or Quadruple X-ray Beams

Lifeng Yu et al. Proc SPIE Int Soc Opt Eng. 2016 Feb.

Abstract

Energy-resolved photon-counting CT (PCCT) is promising for material decomposition with multi-contrast agents. However, corrections for non-idealities of PCCT detectors are required, which are still active research areas. In addition, PCCT is associated with very high cost due to lack of mass production. In this work, we proposed an alternative approach to performing multi-energy CT, which was achieved by acquiring triple or quadruple x-ray beam measurements on a dual-source CT scanner. This strategy was based on a "Twin Beam" design on a single-source scanner for dual-energy CT. Examples of beam filters and spectra for triple and quadruple x-ray beam were provided. Computer simulation studies were performed to evaluate the accuracy of material decomposition for multi-contrast mixtures using a tri-beam configuration. The proposed strategy can be readily implemented on a dual-source scanner, which may allow material decomposition of multi-contrast agents to be performed on clinical CT scanners with energy-integrating detector.

Keywords: Multi-energy CT; basis material decomposition; dual-energy CT; dual-source CT.

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Figures

Figure 1
Figure 1
(a) Twin-beam acquisition on a single source CT (Siemens); (b) Tri-beam acquisition on a dual-source CT; (c) Quadruple-beam acquisition on a dual-source CT.
Figure 2
Figure 2
Example of x-ray beam spectra generated by a tri-beam configuration (a) and a quadruple-beam configuration (b).
Figure 3
Figure 3
Mass density map of the three materials: (a) iodine, (b) gold, and (c) water.
See this image and copyright information in PMC

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