Japanese Journal of Radiology ( IF 2.9 ) Pub Date : 2020-08-07 , DOI: 10.1007/s11604-020-01027-y Hiroto Yunaga 1 , Yasutoshi Ohta 2 , Junichi Kishimoto 1 , Shinichiro Kitao 1 , Mana Ishibashi 1 , Shinya Fujii 1
Purpose
This study evaluated the calcium blooming-reducing effect and the differences of luminal diameter among various-energy virtual monochromatic images (VMIs) using rapid kilovolt-switching dual-energy computed tomography (DECT).
Materials and methods
Forty-five calcified segments in 31 patients were analyzed. For the analysis, 40- to 140-keV VMIs on both non-contrast CT and coronary CT angiography were generated at 10-keV steps, and calcification size and luminal diameter were measured using CT number profile curve and full-width at half-maximum method. We compared calcification size and luminal diameter on each keV VMIs with those on 70-keV VMI.
Results
There was no significant differences among the 40- to 140-keV VMIs regarding calcification size or luminal diameter.
Conclusion
The 40- to 140-keV VMIs produced by single-source DECT had no effect on the calcification size or luminal diameter in the coronary artery.
中文翻译:
能量差对光谱CT评价钙化冠状动脉斑块钙化大小和管腔直径的影响。
目的
这项研究使用快速千伏切换双能计算机断层扫描(DECT)评估了各种能量虚拟单色图像(VMI)之间的钙华减少效果以及管腔直径的差异。
材料和方法
分析了31例患者中的45个钙化节段。为了进行分析,以10 keV的步长在非对比CT和冠状动脉CT血管造影上产生40至140 keV的VMI,并使用CT数分布曲线和半峰全宽测量钙化大小和腔直径方法。我们将每个keV VMI与70-keV VMI上的钙化大小和管腔直径进行了比较。
结果
在40至140keV VMI之间,钙化大小或管腔直径没有显着差异。
结论
单源DECT产生的40至140keV VMI对冠状动脉钙化大小或管腔直径没有影响。