Abstract

Info

Title:: Phantom-based quality testing for spectral computed tomography technology

Author(s):: HU Zhi1; YU Xiao’e1; KANG Lili1; YANG Shaozhou2; CHEN Hongwen3; WANG Fan3; 1. School of Biomedical Engineering, Southern Medical University, Guangzhou 510515, China; 2. TCM-Integrated Cancer Center of Southern Medical University, Guangzhou 510315, China; 3. Nanfang Hospital, Southern Medical University, Guangzhou 510515, China

Keywords:: ; Keywords: spectral computed tomography; quantitative analysis; phantom; imaging technology; iodine; quality assurance

Abstract:: Abstract: Objective To discuss the quality testing method for spectral computed tomography (CT) technology. Methods Based on the conditions for head scan, we used a self-produced iodine reagent phantom to carry out energy scanning experiments on SIEMENS force dual-source CT and GE Discovery CT750 CT. The obtained images were quantitatively analyzed by the post-processing workstation of the two CT systems. Results In the single-energy mode, the spectral CT images under the energy of 60, 70 and 80 keV were obtained, and the obtained images on the two CT systems had agreement CT values. The iodine radical content in iodine solution with different concentrations was distinguished and quantitatively analyzed with the spectral imaging software such as equivalent atomic number matrix histogram, matrix scatter diagram and CT value-energy curves. Conclusion The energy scanning experiments using self-produced iodine reagent phantom on SIEMENS force dual-source CT and GE Discovery CT750 CT verify that using the proposed self-produced iodine reagent phantom for the quality assurance of spectral CT technology is feasible.