双能量CT心肌灌注碘图图像质量与重组时相的关系

发布时间：2018-05-07 02:32

本文选题：心脏 + 灌注成像　；参考：《中国医学影像技术》2017年05期

【摘要】：目的探讨第2代双源CT(DSCT)心肌灌注图像质量与重组时相的关系。方法收集接受DSCT双能量成像方法扫描的患者,选取其中冠状动脉正常者28例。采用回顾性心电门控间隔5%重建出30%~80%R-R时相的图像,采用280ms全期相时间窗,定量测量各R-R间期的每段心肌灌注碘图图像的伪影面积,计算心底部、中部、心尖部、心尖层面平均各段的伪影面积,并进行统计学分析。结果心底部、中部、心尖部、心脏整体平均各段伪影面积差异有统计学意义(P均0.01),均以60%R-R间期时相最小[(0.31±0.28)cm~2、(0.18±0.23)cm~2、(0.13±0.13)cm~2)、(0.22±0.18)cm~2]。心尖伪影面积不同R-R间期时相差异无统计学意义(P=0.634)。60%R-R间期心底部、中部、心尖部、心尖各层面平均各段碘图伪影面积差异有统计学意义(F=3.701,P=0.014),心尖部伪影面积最小,与中部差异无统计学意义(P0.05),但明显低于其他部位的伪影面积(P0.05)。结论第2代DSCT采用280ms全期相时间窗可提供优良的心肌灌注碘图,其中以60%左右R-R间期图像质量最佳。
[Abstract]:Objective to investigate the relationship between myocardial perfusion image quality and recombination phase of the second generation dual CTT DSCT. Methods A total of 28 patients with normal coronary artery were studied by DSCT dual energy imaging. Retrospective ECG gated interval of 5% was used to reconstruct the 30%~80%R-R phase images, and 280ms phase time window was used to quantitatively measure the artifact area of each segment of myocardial perfusion iodine image of each R-R interval, and to calculate the heart bottom, middle and apical part. The artifact area of the apical level was analyzed statistically. Results there were statistically significant differences in the artifact area of the central, middle, apical and heart segments of the whole heart with the smallest phase of 60%R-R interval (0.31 卤0.28) (0.18 卤0.23) (0.13 卤0.13 卤0.13) and 0.22 卤0.22 卤0.22 卤0.22 卤0.22 卤0.22 卤0.22 卤0.22 卤0.22 卤0.22 卤0.22 卤0.22 卤0.22 卤0.22 卤0.22 卤0.22 卤0.22 卤0.22 卤0.22 卤0.13 卤0.13 卤0.13? There was no significant difference in apical artifact area in different R-R intervals. There was no statistical difference in R-R interval between different R-R intervals. There were significant differences in the mean area of iodine artifact in each segment of R-R interval between middle and middle sections. There was a significant difference in artifact area between different sections of the cardiac apex, and the artifact area of the apical region was the smallest, and the artifact area of the apical region was the smallest. There was no significant difference between the two groups, but it was significantly lower than that in other parts. Conclusion the second generation DSCT can provide good myocardial perfusion iodine map by using 280ms phase time window, in which 60% R-R interval image quality is the best.
【作者单位】：南通大学第二附属医院影像科;
【基金】：南通市社会事业科技创新与示范计划资助项目(HS2014066) 南通市关键技术研究-民生项目(MS2015061) 江苏省六大人才高峰高层次人才资助项目(2014WSW074) 南通市第四期“226高层次人才培养工程”科研项目
【分类号】：R816.2

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