CAJ | 학술논문

目的探讨双源CT(DSCT)不同R-R间期间隔及不同重建层厚评价左心室整体功能的临床价值.资料与方法30例临床健康体检者,分别以1%、5%及10%R-R间期间隔重组获得全心动周期图像;不同重建层厚(1、2、3、4、5 mm)全时相重建,并测定各间期及不同重建层厚左心室舒张末期容积(EDV)、收缩末期容积(ESV)、每搏输出量(SV)、左心室射血分数(LVEF).结果①分别采用不同重建层厚进行心功能分析时,不同间隔组间测得心功能结果比较差异无统计学意义(P>0.05).当层厚选择4 mm以上时心室内外膜边界模糊,勾画时有困难.②采用不同R-R间期间隔重建行心功能分析,1%R-R间期间隔EDV、SV、LVEF稍高于10%,10%间隔重建用时最短,但不同间隔组间比较差异无统计学意义(P>0.05).结论DSCT冠状动脉造影同时可以评估左心整体功能,不同层厚、不同R-R间期间隔重组均能准确评价左心功能,但以3 mm层厚、10%R-R间期间隔重组相对方便快捷,具有重要的临床实用价值.
목적탐토쌍원CT(DSCT)불동R-R간기간격급불동중건층후평개좌심실정체공능적림상개치.자료여방법30례림상건강체검자,분별이1%、5%급10%R-R간기간격중조획득전심동주기도상;불동중건층후(1、2、3、4、5 mm)전시상중건,병측정각간기급불동중건층후좌심실서장말기용적(EDV)、수축말기용적(ESV)、매박수출량(SV)、좌심실사혈분수(LVEF).결과①분별채용불동중건층후진행심공능분석시,불동간격조간측득심공능결과비교차이무통계학의의(P>0.05).당층후선택4 mm이상시심실내외막변계모호,구화시유곤난.②채용불동R-R간기간격중건행심공능분석,1%R-R간기간격EDV、SV、LVEF초고우10%,10%간격중건용시최단,단불동간격조간비교차이무통계학의의(P>0.05).결론DSCT관상동맥조영동시가이평고좌심정체공능,불동층후、불동R-R간기간격중조균능준학평개좌심공능,단이3 mm층후、10%R-R간기간격중조상대방편쾌첩,구유중요적림상실용개치.
Purpose To discuss the clinical application of different reconstructive R-R intervals and slice thicknesses to assess left ventricular global function using dual-source computed tomography (DSCT). Materials and Methods Thirty healthy adults underwent dual-source CT coronary angiography (DSCTA). Left ventricular end-diastolic volume (EDV), end-systolic volume (ESV), stroke volume (SV), and ejection fraction (EF) were measured using full cardiac phase reconstruction of different R-R intervals (1%, 5%, 10%) and slice thicknesses (1 mm, 2 mm, 3 mm, 4 mm, 5 mm) respectively. Results There was no significant difference in EDV, ESV, SV and EF among groups with different slice thicknesses (P>0.05). When 4 mm or more slice thickness was chosen, it was difficult to delineate endocardial and epicardial left ventricular contours. There was no significant difference in EDV, ESV, SV and EF among groups with different R-R intervals (P>0.05). The measurements in groups using 1%R-R interval were slightly higher than that using 10%R-R interval, the reconstructive time of 10%R-R interval was the shortest among three groups, but no statistical difference was shown among different groups (P>0.05). Conclusion DSCT coronary artery angiography can evaluate the degree of coronary stenosis and left ventricular function using different R-R intervals and slice thicknesses. 3 mm slice thickness and 10% R-R interval reconstruction are sufficient to accurately evaluate left ventricular function and are also more time-effective.