CAJ | 학술논문

目的通过商业化医用软件Report-Card来对左室容量-时间曲线的可靠性做一初步研究.方法 2011年6至10月收集22名健康志愿者,男12名、女10名,常规扫描得到标准左室二腔心及短轴位图像.以人工划分心内膜方法为参考标准,得到左室舒张末期容积(EDV)、左室收缩末期容积(ESV)等参数.另两名观察者分别应用Report-Card程序得到EDV、ESV等参数.结果对人工划分方法和软件分析方法进行比较,两种方法所得数据差异均无统计学意义(均P＞0.05),相关性较好(EDV为0.963,ESV为0.944),观察者差异和观察者间差异小.每一幅图像的平均用时,人工划分方法的平均处理处理时间为(89±26)s,使用Report-Card 4.0的平均处理时间约为(17±5)s,后者明显较前者短(P＜0.001).结论利用Report-Card分析心脏磁共振图像所得到的左室容量-时间曲线的可靠性良好,是左心功能研究的一种可靠方法.
목적 통과상업화의용연건Report-Card래대좌실용량-시간곡선적가고성주일초보연구.방법 2011년6지10월수집22명건강지원자,남12명、녀10명,상규소묘득도표준좌실이강심급단축위도상.이인공화분심내막방법위삼고표준,득도좌실서장말기용적(EDV)、좌실수축말기용적(ESV)등삼수.령량명관찰자분별응용Report-Card정서득도EDV、ESV등삼수.결과 대인공화분방법화연건분석방법진행비교,량충방법소득수거차이균무통계학의의(균P＞0.05),상관성교호(EDV위0.963,ESV위0.944),관찰자차이화관찰자간차이소.매일폭도상적평균용시,인공화분방법적평균처리처리시간위(89±26)s,사용Report-Card 4.0적평균처리시간약위(17±5)s,후자명현교전자단(P＜0.001).결론 이용Report-Card분석심장자공진도상소득도적좌실용량-시간곡선적가고성량호,시좌심공능연구적일충가고방법.
Objective To conduct a preliminary study on the reliability of left ventricle volume filling curve through the commercial medical program Report-Card 4.0.Methods A total pf 22 normal volunteers underwent the examination.Images of standard 2-chamber view and short-axis view were acquired at end-expiration by electrocardiography-gated FIESTA CINE sequence.Then one experienced doctor manually contoured the endocardium during end-systole and end-diastole phases respectively,obtained the results of the volume of end-diastole (EDV) and end-systole (ESV),ejection fraction (EF),stroke volume (SV) and cardiac output (CO),processing time and mean processing time per phase.Papillary muscle was not included into left ventricle volume.Another two observers utilized LV ANALYSIS of Report-Card,generated the left ventricle volume filling curve and recorded the processing time and mean processing time per phase.From the curve,EDV,ESV,SV,EF,CO,peak ejecting rate(PER)and peak filling rate(PFR) were also acquired.One observer repeated the procedures a week later.Results The difference of results from two methods were insignificant (P ＞ 0.05) and the correlation was excellent (EDV 0.963,ESV 0.944).Intra-observer and inter-observer variability for measurements (EDV,ESV) were assessed by Bland-Altman analysis and interclass correlation coefficient (0.985,0.987,0.959 and 0.957 respectively).The mean processing time (179 ± 51) s by means of manually contouring was significantly less than the mean processing time (331 ± 99) s through REPORT-CARD 4.0 (P ＜ 0.001).However,the mean processing time per phase (17 ± 5) s by means of REPORT-CARD 4.0 was significantly less than the mean processing time per phase (89 ± 26) s through manually contouring (P ＜ 0.001).Conclusion The reliability of left ventricle volume filling curve generated through Report-Card is excellent.Left ventricle volume filling curve may be a reliable method of further studying the functions of left ventricle.