直肠磁共振弥散峰度成像可重复性评价

发布时间：2018-05-20 19:03

本文选题：DKI + 直肠　；参考：《中国医学计算机成像杂志》2015年06期

【摘要】：目的:探讨Philips Achieva 3.0T TX磁共振直肠弥散峰度成像的可重复性。方法:应用Philips Achieva 3.0T TX超导型磁共振扫描仪。8通道体部相控阵线圈。对27例健康志愿者在不同时间(24小时~2周内)行两次行DKI扫描。DKI采用单次激发自旋回波-平面回波(SE-EPI)序列,启用5个扩散梯度场(b=0、500、1000、1500、2000 s/mm2),扩散梯度同时取X、Y和Z三个方向。由两名5年以上工作经验的医生双盲对图像进行后处理,获得同一层面的MD值、MK值,然后进行统计学分析。结果:所有27例志愿者均成功获得DKI数据。MD值及MK值观察者内相关系数分别为0.962、0.958;变异系数分别为17.8%、18.9%。MD值及MK值观察者间相关系数分别为0.925、0.895;变异系数分别为18.5%、23.6%。结论:直肠弥散峰度成像具有较高的可重复性。
[Abstract]:Objective: To explore the repeatability of Philips Achieva 3.0T TX magnetic resonance rectal dispersion kurtosis imaging. Methods: the.8 channel volume phased array coil of Philips Achieva 3.0T TX magnetic resonance scanner was applied to 27 healthy volunteers at different time (24 hours ~2 weeks) for two times DKI scan.DKI to use single excitation spin echo plane return. Wave (SE-EPI) sequence, using 5 diffusion gradient field (b=0500100015002000 s/mm2), diffusion gradient simultaneously taking X, Y and Z in three directions. A doctor with two years and more than 5 years of work experience after double blind image processing, obtain the same level of MD value, MK value, and then carry out statistical analysis. Results: all 27 volunteers have successfully obtained DKI data. The internal correlation coefficients of the MD and MK values were 0.962,0.958, the coefficient of variation was 17.8%, the correlation coefficient between the 18.9%.MD and MK values was 0.925,0.895, the coefficient of variation was 18.5%, respectively, and the 23.6%. conclusion: the rectal dispersion kurtosis imaging has a high repeatability.
【作者单位】：福建省肿瘤医院放诊科;
【基金】：福建省卫生计生委青年科研课题NO.2015-1-13~~
【分类号】：R445.2

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