不同管电压下前瞻性心电门控双源CT诊断冠心病的比较分析  

Comparative Analysis of Prospective ECG Gated Dual-Source CT in the Diagnosis of Coronary Heart Disease at Different Tube Voltages

作　　者：贾蕾 高律萍 曹成瑛 赵丰平[2] JIA Lei;GAO Lvping;CAO Chengying;ZHAO Fengping(Department of Radiology,Qinghai Province Cardiovascular and Cerebrovascular Disease Specialist Hospital,Xining 810099,Qinghai,P.R.China;Department of Imaging,Qinghai Provincial People’s Hospital,Xining 810007,Qinghai,P.R.China)

机构地区：[1]青海省心脑血管病专科医院放射科,青海西宁810099 [2]青海省人民医院影像科,青海西宁810007

出　　处：《影像科学与光化学》2022年第4期883-887,共5页Imaging Science and Photochemistry

摘　　要：本研究探讨前瞻性心电门控双源CT低管电压在冠心病诊断中的应用价值。回顾性选取60例冠心病患者,根据管电压分为观察组(管电压80 kV)和对照组(管电压100 kV),观察两组诊断情况、图像质量等差异。观察组和对照组诊断冠状动脉狭窄的灵敏性、特异性、准确性、阳性预测值、阴性预测值、冠状动脉节段图像质量评分比较,差异无统计学意义(P>0.05)。观察组和对照组升主动脉根部、右冠状动脉开口、左冠状动脉开口管腔CT值、信噪比(SNR)和对比噪声比(CNR)比较,差异无统计学意义(P>0.05)。观察组剂量长度乘积(DLP)、容积CT剂量指数(CTDIvol)和有效辐射剂量(ED)明显低于对照组(P<0.05)。观察组心率<75次/分患者冠状动脉节段图像质量优于心率≥75次/分患者(P<0.05)。因此,前瞻性心电门控双源CT低管电压在冠心病诊断中有较好的应用价值,具有图像质量好、辐射剂量低等优点,同时心率会影响图像质量。This study investigated the value of prospective ECG gated dual-source CT at low tube voltage in the diagnosis of coronary heart disease.Retrospectively selected 60 patients with coronary heart disease,and divided them into observation group(tube voltage 80 kV)and control group(tube voltage 100 kV)according to tube voltage,then compared the differences of diagnosis and image quality and so on between the two groups.There was no significant difference in sensitivity,specificity,accuracy,positive predictive value,negative predictive value and coronary segment image quality score between the observation group and the control group(P>0.05).There were no significant differences in CT valuesin ascending aortic root,right coronary artery opening and left coronary artery opening,signal-to-noise ratio(SNR)and contrastive noise ratio(CNR)between the observation group and the control group(P>0.05).The dose length product(DLP),volume CT dose index(CTDIvol)and effective radiation dose(ED)in the observation group were significantly lower than those in the control group(P<0.05).The image quality of coronary artery segments in patients with heart rate<75 beats/min in the observation group was better than patients with heart rate≥75 beats/min(P<0.05).So the prospective ECG gated dual-source CT low tube voltage has good application value in the diagnosis of coronary heart disease,which has the advantages of good image quality and low radiation dose,and the heart rate will affect the image quality.

关 键 词：心电门控双源CT 低管电压 冠心病 辐射剂量 

分 类 号：R816.2[医药卫生—放射医学] R541.4[医药卫生—临床医学]