无心率控制第二代双源CT前门控序列扫描冠状动脉造影的临床评价  

Clinical evaluation of coronary angiography by prospective ECG gated sequence scanning using second generation dual source CT：no heart rate control

作　　者：赵磊[1] 刘挨师[1] 

机构地区：[1]内蒙古医科大学附属医院CT室,内蒙古呼和浩特010050

出　　处：《实用放射学杂志》2016年第12期1936-1939,1944,共5页Journal of Practical Radiology

基　　金：内蒙古自治区卫生和计划生育委员会科研项目（201301050）;内蒙古医科大学青年创新基金项目（YKD2013QNCX024）.

摘　　要：目的：分析无心率控制下的患者不同采集窗设置,明确前瞻性心电门控序列扫描对图像质量与辐射剂量的影响。方法前瞻性选取75例患者行CT冠状动脉造影（CTCA）扫描,中位年龄55岁。所有患者均无心率控制。心率≤65次/min采集期相设置为65%-75%,65次/min〈心率≤80次/min采集期相设置30%-75%,心率〉80次/min采集期相设置为35%-45%。分析患者辐射剂量与冠状动脉图像质量主观评分。结果75例患者有效剂量（ED）为（2.44±1.21）mSv,其中A组为（1.54±0.41）mSv,B组为（3.57±0.53）mSv,C组为（1.64±0.27）mSv；A组vs B组P=0.000,A组vs C组P=0.854,B组 vs C组P=0.000。75例患者共评价1043段冠状动脉节段,平均显示13.9段,（3.66±0.51）分。其中A组（3.75±0.44）分；B组（3.60±0.54）分；C组（3.38±0.67）分；A组vs B组P=0.000,A组vs C组P=0.004,B组vs C组P=0.032。结论前瞻性心电门控序列扫描通过适应不同心率修改采集窗范围可以获得可评估的图像质量,并且避免不必要的辐射剂量产生,值得进一步研究与应用。Objective To analyze the effects of image quality and radiation dose of the patients with no heart rate control on different acquisition window settings.Methods A total of 75 patients underwent CTCA scan,with a median age of 55 years.All patients had no heart rate control.HR≤65 beats per minute acquisition phase setting was from 65%to 75%,65 beats per minute〈HR≤80 beats per minute acquisition phase setting was from 30%-75%and HR〉80 beats per minute acquisition phase setting was from 35%to 45%.Evaluated patients radiation dose and subjective image quality of coronary artery.Results 75 patients with ED was （2.44±1.21）mSv,group A was （1.54±0.41）mSv, group B was （3.57±0.53）mSv,group C was （1.64±0.27）mSv,group A vs group B（P=0.000）,group A vs group C（P=0.854）,group B vs group C（P=0.000）.A total of 1 043 coronary artery segments of 75 patients were evaluated,with an average of 13.9 segments showed by every case,（3.66±0.51）scale.Group A was （3.75±0.44）scale,group B was （3.60±0.54）scale,group C was （3.38±0.67） scale,group A vs group B（P=0.000）,group A vs group C（P=0.004）,group B vs group C（P=0.032）.Conclusion The prospective ECG gated sequence scan could obtain the image quality and avoid unnecessary radiation dose by adapting to the different heart rate.

关 键 词：冠状动脉 计算机体层成像 辐射剂量 

分 类 号：R322.1[医药卫生—人体解剖和组织胚胎学] R814.42[医药卫生—基础医学]