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

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

目的:探讨uCT960+宽体探测器CT单心动周期扫描在心律不齐患者冠状动脉成像(CCTA)中的应用。方法:选择2020年6月至12月复旦大学附属中山医院放射诊断科收治的接受CCTA检查的心律不齐患者63例和同期正常窦性心律的患者63例。采用5分法评估冠状动脉节段的图像质量,比较2组对比噪声比(contrast noise ratio,CNR)、信噪比(signal to noise ratio,SNR)、主动脉根部CT值、有效辐射剂量(effective radiation dose,ED)及冠状动脉图像质量评分。结果:心律不齐组和正常心律组性别、年龄差异无统计学意义,心率差异有统计学意义(P<0.01)。所有患者图像均能满足诊断需要,2组患者的主观评分、冠脉各段CT值、SNR、CNR差异无统计学意义。心律不齐组ED约为正常心律组的150%。结论:用uCT960+宽体探测器CT对心律不齐患者行CCTA时图像质量与正常心律的患者无差异,且辐射剂量可接受。

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.