快速平衡稳态采集与单次激发快速自旋回波序列诊断正常胎儿胸腺的价值比较

发布时间：2018-04-14 12:12

本文选题：磁共振成像 + 胎儿　；参考：《中国医学影像技术》2017年10期

【摘要】：目的比较MRI快速平衡稳态采集(FIESTA)与单次激发快速自旋回波(SSFSE)序列诊断正常胎儿胸腺的价值。方法对366胎正常胎儿行MR检查,采用FIESTA与SSFSE序列分别观察胎儿胸腺的解剖和MR表现,结果行Kappa和χ2检验。于"三血管"层面测量胸腺面积(TA)、横径(TD),于矢状位测量上下径(SID),计算各孕周参数均值,拟合各参数与孕周的回归方程。结果2名医师对FIESTA和SSFSE序列图像的评价结果一致性较好(Kappa=0.745、0.802,P均0.01),FIESTA和SSFSE序列图像显示清晰率分别为86.34%(632/732)和37.70%(276/732),差异有统计学意义(χ2=367.520,P0.001)。胎儿胸腺大小随孕周延长而增大,回归方程分别为:TA=-5.80+0.35×孕周(r=0.820,P0.01);TD=-14.59+1.63×孕周(r=0.817,P0.01);SID=-9.63+1.44×孕周(r=0.778,P0.01)。结论 FIESTA较SSFSE序列可更清晰地显示胎儿胸腺的细微结构及其轮廓,MRI能清晰地显示孕22周后的胎儿胸腺。
[Abstract]:Objective to compare the value of MRI fast balanced steady state acquisition (FIESTAA) and single shot fast spin echo (SSFSE) sequence in the diagnosis of normal fetal thymus.Methods the normal fetuses of 366 fetuses were examined by Mr. FIESTA and SSFSE sequences were used to observe the anatomy and Mr manifestations of fetal thymus respectively. Kappa and 蠂 2 tests were performed.The thymus area was measured on the "three vessels" plane, the transverse diameter was measured by TDV, and the upper and lower diameters were measured in sagittal position. The mean values of the parameters of each gestational week were calculated, and the regression equations between the parameters and the gestational weeks were fitted.Results the evaluation results of FIESTA and SSFSE images by two physicians were consistent. The clear rates of Festa and SSFSE images were 86.340.62 / 732 and 37.70 ~ 2766 / 732, respectively (蠂 ~ 2 367.520g / 0.001), and the difference was statistically significant (蠂 ~ 2 367.520g P 0.001).The size of fetal thymus increased with gestational weeks, and the regression equations were as follows: 1. TA-5.80 0.35 脳 gestational week, 0. 820 and P 0. 01, respectively. TDU-14.59 1. 63 脳 gestational week, r0. 817, P0. 01 and SID-9.63. 44 脳 gestational week, r778P0. 01.Conclusion FIESTA can display the fine structure and outline of fetal thymus more clearly than SSFSE sequence.
【作者单位】：重庆医科大学附属第一医院放射科;
【基金】：国家临床重点专科建设项目(2013544)
【分类号】：R445.2;R714.5

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