CAJ | 학술논문

目的探讨64排螺旋CT冠脉成像中影响图像质量的各种因素及其影响程度以及评估冠脉狭窄的效果.方法通过838例临床疑似冠心病患者的6_4排螺旋CT冠脉成像,并以其中218例在1周内进行的常规冠状动脉造影为标准,分析64排螺旋CT冠脉成像在评估冠脉狭窄的灵敏度、准确率、阳性预测值和阴性预测值.结果心率、心率变化幅度、延迟时间设定、β受体阻滞剂、呼吸频率、屏气合作与否、造影剂注射总量与速度、图像重建时相、冠状动脉钙化、扫描参数、患者年龄性别、机器软硬件性能等是影响64排螺旋CT成像质量的因素.64排螺旋CT冠脉成像评估冠脉狭窄的准确率为95.9%,阳性与阴性预测值分别为92.3%、90.0%.结论得到了影响64排螺旋CT冠脉成像的各种因素,分析了减少和消除这些因素影响的方法.在评估冠脉狭窄方面,64排螺旋CT冠脉成像基本能满足临床要求.
목적 탐토64배라선CT관맥성상중영향도상질량적각충인소급기영향정도이급평고관맥협착적효과.방법 통과838례림상의사관심병환자적6_4배라선CT관맥성상,병이기중218례재1주내진행적상규관상동맥조영위표준,분석64배라선CT관맥성상재평고관맥협착적령민도、준학솔、양성예측치화음성예측치.결과 심솔、심솔변화폭도、연지시간설정、β수체조체제、호흡빈솔、병기합작여부、조영제주사총량여속도、도상중건시상、관상동맥개화、소묘삼수、환자년령성별、궤기연경건성능등시영향64배라선CT성상질량적인소.64배라선CT관맥성상평고관맥협착적준학솔위95.9%,양성여음성예측치분별위92.3%、90.0%.결론 득도료영향64배라선CT관맥성상적각충인소,분석료감소화소제저사인소영향적방법.재평고관맥협착방면,64배라선CT관맥성상기본능만족림상요구.
Objective To study the various factors that influence image quality of 64-slice spiral CT coronary artery imaging, their impact extent and the assessment effect of coronary artery stonnsis. Methods Through examination of 838 clinical coronary heart disease suspect patients, by 64-slice spiral CT coronary artery imaging, in which, 218 patients were also examined by conventional coronary angiagraphy in a week, we took the conventional coronary angiography as the standard, analyzed the 64-slice spiral CT coronary artery imaging in the assessment of coronary artery stenosis by sensitivity, accuracy, positive predictive value and negative predictive value. Results The factors which affect the image quality of 64-slice spiral CT coronary artery imaging include heart rate, heart rate change range, delay time setting, β-blocker, respiratory rate, breath-holding or not, total amount of contrast medium and the speed of injection, image reconstruction phase, coronary artery calcification, the scan parameters, age and sex of patients, machine hardware and software performance and so on. The accuracy of the 64-slice spiral CT coronary artery imaging assessment of coronary artery stenasis was 95.9 % while the predictive values were 92.3%, 90.0% for positive and negative, respectively. Conclusion The influential factors are introduced as well as the methods that wig reduce or eliminate these factors. In the application of assessing coronary artery stonnsis, 64-slice spiral CT coronary artery imaging can basically meet the clinical requirements.