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：

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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。