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http://dx.doi.org/10.7742/jksr.2019.13.4.523

3D Fusion Imaging based on Spectral Computed Tomography Using K-edge Images  

Kim, Burnyoung (Department of Medical Science, Konyang University)
Lee, Seungwan (Department of Medical Science, Konyang University)
Yim, Dobin (Department of Radiological Science, Konyang University)
Publication Information
Journal of the Korean Society of Radiology / v.13, no.4, 2019 , pp. 523-530 More about this Journal
Abstract
The purpose of this study was to obtain the K-edge images using a spectral CT system based on a photon-counting detector and implement the 3D fusion imaging using the conventional and spectral CT images. Also, we evaluated the clinical feasibility of the 3D fusion images though the quantitative analysis of image quality. A spectral CT system based on a CdTe photon-counting detector was used to obtain K-edge images. A pork phantom was manufactured with the six tubes including diluted iodine and gadolinium solutions. The K-edge images were obtained by the low-energy thresholds of 35 and 52 keV for iodine and gadolinium imaging with the X-ray spectrum, which was generated at a tube voltage of 100 kVp with a tube current of $500{\mu}A$. We implemented 3D fusion imaging by combining the iodine and gadolinium K-edge images with the conventional CT images. The results showed that the CNRs of the 3D fusion images were 6.76-14.9 times higher than those of the conventional CT images. Also, the 3D fusion images was able to provide the maps of target materials. Therefore, the technique proposed in this study can improve the quality of CT images and the diagnostic efficiency through the additional information of target materials.
Keywords
Spectral CT; Photon-counting detector K-edge imaging; Fusion image;
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Times Cited By KSCI : 1  (Citation Analysis)
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