320排探测器CT单心动周期扫描应用于心律不齐患者冠状动脉成像的可行性

目的 探讨uCT960+宽体探测器CT单心动周期在心律不齐患者行冠状动脉CT成像的可行性。方法 对接受冠状动脉CT成像检查的63例心律不齐患者和63例窦性心律患者的临床资料进行回顾性分析。采用五分法评估冠状动脉节段的图像质量。比较两组对比噪声比（CNR）、信噪比（SNR）、主动脉根部CT值、有效辐射剂量（ED）及冠状动脉图像质量评分。结果 两组性别，年龄无显著性差异（P≥0.05）;心律波动有统计学意义（P＜0.01）;所有患者图像均能满足诊断需要，两组患者的主观评分无显著差异（P≥0.05）;两组冠脉各段CT值、SNR、CNR无统计学差异（P≥0.05）;心律不齐组有效辐射剂量为窦性心律组的150%。结论 uCT960+宽体探测器CT对心律不齐患者行CCTA与窦性心律患者图像质量无差异，且辐射剂量保持在可接受水平。

Feasibility of single cardiac cycle 320 detector CT scan in patients with arrhythmia undergoing coronary angiography

Objective: To explore the feasibility of uCT960+wide body detector computed tomography (CT) single cycle coronary angiography in patients with arrhythmia.Methods: From June to December 2020, 63 patients with arrhythmia who underwent coronary CT imaging were selected from the Department of Radiology, Zhongshan Hospital, Fudan University. The clinical data of 63 patients with normal rhythm who underwent coronary CTA at the same time were randomly included.The image quality of coronary artery segments was evaluated by five score method. The contrast to noise ratio (CNR), signal to noise ratio (SNR), aortic root CT value, effective radiation dose (ED) and coronary artery image quality score were compared between the two groups.Results: There was no significant difference in gender and age between the two groups. The difference in heart rate was statistically significant (P<0.01). The images of all patients could meet the needs of diagnosis, and there was no significant difference in subjective score between the two groups. There was no significant difference in CT value, SNR, and CNR between the two groups. The ED in arrhythmia group was 150% of that in normal rhythm group.Conclusions: There is no difference in image quality of CCTA between normal rhythm people and patients with arrhythmia in uCT960+wide body detector CT, and the radiation dose is acceptable for arrhythmia patient.