炫速双源 CT 低剂量双能量冠状动脉成像技术初探
刘超然;韩丹;江杰;潘晓龙;金弋人;赵卫
【期刊名称】《实用放射学杂志》 【年(卷),期】2016(032)008
【摘要】目的：探讨双能量冠状动脉 CTA(DE-CCTA)低剂量检查的可行性。方法疑似冠心病并行 DE-CCTA 检查240例,根据 A 球管电流和重建方式分为4组：常规剂量 A 组(180 mAs+FBP 重建),低剂量 B 组、C 组、D 组(分别为150 mAs、120 mAs、90 mAs+SAFIRE 重建)；比较4组图像平均 CT 值、图像噪声、信噪比(SNR)、对比噪声比(CNR)、图像质量主观评分及辐射剂量等。其中52例 CT 发现冠状动脉狭窄患者行冠状动脉造影(CAG)检查,比较2种检查方法诊断冠状动脉狭窄程度的一致性。结果所有冠状动脉节段的图像评分均在3分以上。4组评分比较差异有统计学意义(P <0.05)。4组平均 CT 值差异无统计学意义(P >0.05)。4组噪声、SNR、CNR 差异有统计学意义(P <0.05)。4组辐射剂量比较差异有统计学意义(P <0.05),D 组较 A 组有效剂量(ED)均下降了55.62%。DE-CCTA 与 CAG 诊断冠状动脉狭窄程度一致性极好(Kappa=0.84,P <0.05)。结论低剂量 DE-CCTA 既不影响图像质量和诊断准确性,又明显降低了辐射剂量。%Objective To investigate the value of low-dose coronary artery imaging with flash dual-energy CT.Methods In total of 240 patients suspected with coronary heart disease were performed dual-energy CCTA(DE-CCTA)and were divided into four groups according to the A tube electric current and the methods of reconstruction,including group A(conventional group:180 mAs+FBP)and
low-dose groups(including group B,C,D:1 50 mAs,120 mAs,90 mAs +SAFIRE,respectively).The
mean
of
CT
value,
image
noise,SNR,CNR,image quality and radiation dosage were compared among the four groups.Among the patients,52 cases with coronary artery stenosis which were diagnosised by DE-CCTA were also confirmed by CAG,and the consistency of these two methods in the diagnosis of coronary artery stenosis were compared.Results The scores of all image quality were more than 3 points and were statistically significant among the four groups(P <0.05).The mean of CT value is not statistically significant (P >0.05), while the image noise,SNR,CNR and the radiation dosage were statistically significant (P <0.05)among the four groups.The ED of group D was lower 55.62% than group A.DE-CCTA and CAG in the diagnosis of coronary artery stenosis had satisfactory consistency (Kappa=0.84,P<0.05).Conclusion Low-dose coronary artery DE-CCTA not only have none affect of image quality and diagnostic accuracy, but also can significantly reduce the radiation dosage.
【总页数】5页(1277-1281)
【关键词】双能量;计算机体层成像;血管造影术;冠状动脉 【作者】刘超然;韩丹;江杰;潘晓龙;金弋人;赵卫
【作者单位】昆明医科大学第一附属医院医学影像科，云南 昆明 650032;昆明医科大学第一附属医院医学影像科，云南 昆明 650032;昆明医科大学第一附属
医院医学影像科，云南 昆明 650032;昆明医科大学第一附属医院医学影像科，云南 昆明 650032;昆明医科大学第一附属医院医学影像科，云南 昆明 650032;昆明医科大学第一附属医院医学影像科，云南 昆明 650032 【正文语种】中文
【中图分类】R814.42;R815.2 【文献来源】
https://www.zhangqiaokeyan.com/academic-journal-cn_journal-practical-radiology_thesis/0201239601499.html 【相关文献】
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炫速双源 CT 低剂量双能量冠状动脉成像技术初探
