FC56锐利算法重建技术对冠状动脉CT造影图像的优化作用

doi:10.3969/j.issn.2095-9400.2019.08.002

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摘要目的：探讨320排CT下FC56锐利算法图像重建技术（FR）对冠状动脉CT造影（CCTA）的改良价值。方法：通过扫描Catphan 500体模，对比分析FR及常规算法重建（RR）图像的空间分辨率。回顾性分析温州医科大学附属第一医院行经皮冠状动脉造影（ICA）的55例冠心病患者的术前3个月内的320排CCTA影像资料，对比FR及RR图像上的冠状动脉狭窄程度评分的差异性。结果：体模扫描结果提示，FR图像的空间分辨率达到9l p/cm，而RR图像的空间分辨率为7l p/cm。55例入组冠心病患者中，共709段冠状动脉节段纳入实验，以ICA为金标准，狭窄片段共159段，FR图像上的冠状动脉狭窄评分比RR图像结果更准确，与ICA结果比较差异无统计学意义（P＞0.05），而RR结果与ICA差异具有统计学意义（P＜0.05）；对于3级及以上狭窄或管径大于1.5 mm的狭窄冠状动脉片段，FR图像的冠状动脉狭窄评分与ICA结果的一致性极高（Kappa≥0.8）；在管径小于1.5 mm的狭窄冠状动脉节段，尽管FR图像与RR图像上诊断冠状动脉狭窄的准确率无统计学差异，但FR图像仍与ICA具有很高的一致性（0.6≤Kappa＜0.8）。结论：320排CT下FR重建技术能有效提高图像的空间分辨率，改善CCTA的诊断准确性。

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	满意
	郑葵葵
	王镇章
	李娜
	陈伟建
	曹国全

关键词 ：冠状动脉CT造影, 冠状动脉造影, 重建技术, 空间分辨率

Abstract：Objective: To investigate the improvement of coronary artery CT angiography (CCTA) images by using the filter function 56 reconstruction technique under 320-row CT. Methods: We compared the spatial resolution between the filter function 56 sharpness algorithm reconstruction (FR) images and the routine reconstruction (RR) images by scanning the Catphan 500 phantom. 55 patients with coronary heart disease who underwent invasive coronary angiography (ICA) and CCTA in the First Affiliated Hospital of Wenzhou Medical University were included in the study. The differences of the evaluation for the degree of coronary artery stenosis between FR and RR images were retrospectively analyzed. Results: The result of the phantom CT scan suggested that the spatial resolution of FR could reach 9l p/cm, and that of RR was just 7l p/cm. In 55 patients, 709 segments of the coronary segments were included in our study. With ICA as the gold standard, 159 stenosis segments were found in our study. The coronary stenosis score on the FR image was more accurate than the RR image. There was no significant difference between the results of FR and ICA (P>0.05), and the results of RR were statistically different from ICA (P<0.05). The coronary stenosis score of the FR image was highly consistent with the ICA results (Kappa≥0.8). For the stenotic coronary segments with the diameter less than 1.5 mm, although there was no statistically significant difference between the FR images and the RR images, the FR image was still highly consistent with ICA (0.6≤Kappa<0.8). Conclusion: The FR technique under 320-row CT can effectively improve the spatial resolution of the images and improve the diagnostic accuracy of the CCTA.

Key words： coronary CT angiography coronary angiography reconstruction technique spatial resolution

基金资助:国家自然科学基金资助项目（81670227）。

通讯作者: 曹国全，主任技师，Email：122257935@qq.com。

作者简介: 满意（1986-），男，甘肃天祝人，住院医师，硕士。

链接本文:

https://xb.wmu.edu.cn/CN/10.3969/j.issn.2095-9400.2019.08.002 或 https://xb.wmu.edu.cn/CN/Y2019/V49/I8/552

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