应用能谱 CT 评价钙化冠脉斑块时能量差异对钙化大小和管腔直径评估的影响
Effect of energy difference in the evaluation of calcification size and luminal diameter in calcified coronary artery plaque using spectral CT.
机构信息
Division of Radiology, Department of Pathophysiological Therapeutic Science, Faculty of Medicine, Tottori University, 36-1, Nishi-cho, Yonago, Tottori, 683-8504, Japan.
Department of Radiology, National Cerebral and Cardiovascular Center, Osaka, Japan.
出版信息
Jpn J Radiol. 2020 Dec;38(12):1142-1149. doi: 10.1007/s11604-020-01027-y. Epub 2020 Aug 7.
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.
目的
本研究采用快速千伏切换双能计算机断层扫描（DECT）评估了不同能量虚拟单色图像（VMIs）的钙辉现象减少效果及管腔直径差异。
材料与方法
对 31 例患者的 45 个钙化节段进行了分析。在分析中，采用 10keV 步长生成非对比 CT 和冠状动脉 CT 血管造影的 40-140keV VMIs，并使用 CT 值轮廓曲线和半最大值全宽法测量钙化大小和管腔直径。我们将每个 keV VMIs 上的钙化大小和管腔直径与 70keV VMI 上的值进行了比较。
结果
在钙化大小或管腔直径方面，40-140keV VMIs 之间没有显著差异。
结论
单源 DECT 生成的 40-140keV VMIs 对冠状动脉内的钙化大小或管腔直径没有影响。
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