| 摘要: |
| 的应用双源CT（DSCT）评估左心耳容积和功能，并与磁共振（CMR）检测结果进行对比，探讨双源CT的评估价值。方法2008年3月至2009年2月，对62例冠状动脉CTA检查患者进行DSCT和MR检查（1 d内完成），获得DSCT容积数据及左心房垂直长轴快速稳态平衡进动序列(FIESTA)电影图像，采用各自的心功能分析软件分别对原始数据进行后处理，测定左心耳最大容积(LAAVmax )、最小容积(LAAVmin)和左心耳射血分数(LAAEF)。采用线性相关和t检验分析DSCT、CMR检查结果的一致性；采用Bland-Altman分析操作者间的变异性。结果DSCT、CMR所测得左心耳容积及功能间无统计学差异，具有良好的相关性，LAAVmax 、LAAVmin、LAAEF(%)相关系数分别为0.85、0.86、0.76；但与CMR相比，DSCT有高估LAAVmax、LAAVmin和低估LAAEF的趋势。DSCT测量左心耳容积和功能的操作者间一致性高于CMR。结论DSCT可较准确评估左心耳容积和功能，且结果重复性高。 |
| 关键词: 双源计算机体层摄影术 磁共振成像 左心耳 功能 |
| DOI：10.3724/SP.J.1008.2010.0621 |
| 投稿时间：2010-02-21修订日期：2010-05-12 |
| 基金项目: |
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| Assessment of left atrial appendage volume and function by DSCT |
| WEN Zhao-ying*, ZHANG Zhao-qi, YU Wei, FAN Zhan-ming, DU Jing, LV Biao |
| (Department of Radiology, Anzhen Hospital, Capital Medical University, Beijing 100029, China) |
| Abstract: |
| bjectiveTo use dual source computed tomography (DSCT) for assessment of left atrial appendage volume and function, and to compare the results with those of cardiac cine MR (CMR). MethodsSixty-two patients who received computed tomography angiography (CTA) during March 2008 to Feb. 2009 were included in the present study. The DSCT data sets (Somatom Definition, Siemens Medical Solutions, Forchheim, Germany) and FIESTA (fast imaging employing steady-state acquisition) cines (Signa Excite HD 3T, GE) of the vertical long axis covering the left atrium were obtained on the same day. The images were analyzed to obtain LAAVmax, LAAVmin and LAAEF using Vitrea Heart Function software and Report Card 2.0 software, for DSCT and CMR. Intermodality agreement between DSCT and CMR was tested using linear regression and t test. Interobserver variability was tested by Bland-Altman analyses. ResultsThe DSCT and CMR measurements of the left atrial appendage volume and function were not significantly different, and the measurements of the two methods were well correlated with each other, with the coefficient of LAAVmax, LAAVmin, and LAAEF(%) being 0.85, 0.86, and 0.76, respectively. However, compared with CMR, DSCT showed a tendency of overestimating LAAVmax, LAAVmin and underestimating LAAEF. The interobserver variability of DSCT measurements was lower than that of CMR measurements. ConclusionDSCT is accurate in assessing the left atrial appendage volume and function of patients referred for coronary CT imaging, and the results are reproducible. |
| Key words: dual source computed tomography magnetic resonance imaging left atrial appendage function |
