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K-edge imaging visualization of multi-material decomposition in CT using virtual mono-energetic images
Author(s): Kevin C. Ma; Thomas W. Holmes; Amir Pourmorteza
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Paper Abstract

Virtual mono-energetic images (VMI) are derived from dual- and multi-energy CT acquisitions to visualize attenuation tomograms of an object at a specific x-ray energy. Conventional VMI calculation does not involve k-edge imaging for heavier contrast materials, such as gadolinium and bismuth. To achieve results closer to real-world values, we have developed a VMI calculation and visualization tool that includes k-edge imaging. The algorithm is tested on multi-material decomposition of iodine and gadolinium in a virtual phantom. Attenuation values are calculated for varying concentration of iodine and gadolinium in the simulated phantom. A visualization toolkit is developed to perform VMI calculation and displays output images. Attenuation changes based on incident x-ray energies can be tested and observed, and a characteristic jump in attenuation can be observed in VMI at the 50kV energy (k-edge of gadolinium) in vials containing Gd.

Paper Details

Date Published: 28 May 2019
PDF: 5 pages
Proc. SPIE 11072, 15th International Meeting on Fully Three-Dimensional Image Reconstruction in Radiology and Nuclear Medicine, 110722H (28 May 2019); doi: 10.1117/12.2534918
Show Author Affiliations
Kevin C. Ma, Emory Univ. School of Medicine (United States)
Winship Cancer Institute of Emory Univ. (United States)
Thomas W. Holmes, Emory Univ. (United States)
Winship Cancer Institute of Emory Univ. (United States)
Amir Pourmorteza, Emory Univ. (United States)
Winship Cancer Institute of Emory Univ. (United States)


Published in SPIE Proceedings Vol. 11072:
15th International Meeting on Fully Three-Dimensional Image Reconstruction in Radiology and Nuclear Medicine
Samuel Matej; Scott D. Metzler, Editor(s)

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