目的：探讨磁共振成像中利用区域生长法测量胎儿羊水量的可行性。方法选取26例胎儿的磁共振图像，采用传统方法和区域生长法对胎儿的羊水量进行测量，测量误差值并计算回归线性方程。结果羊水过少时的测量误差为10%～15%，而羊水量正常和过多时的测量误差为1.2%～8%，最后计算得到的回归线性方程为Y=0.975X-9.748。线性方程矫正后的平均羊水量误差仅为2.32%。结论对胎儿进行磁共振检查后，采用区域生长法测量胎儿的羊水量具有操作简单、测量数据真实等优点，可以作为临床对于胎儿羊水量评估的有效手段。%Objective To study the feasibility of the region growing method in measuring the amniotic lfuid in fetal MRI. Methods Altogether 26 foetuses were selected and scanned by MRI. Then, the amniotic lfuid in fetal MRI was measured respectively through the region growing method and the traditional method so as to measure the error value and calculate the linear regression equation. Results The measurement error was 10%to 15%under the conditions of oligohydramnios;while the error was in excess of 1.2%to 8%under the conditions of normality and polyhydramnios. The linear regression equation was calculated as Y=0.975X-9.748. After rectiifcation of the amniotic lfuid value through the linear regression equation, the average error was reduced to only 2.32%. Conclusion The region growing was an easy-to-operate method for precise measurement of the amniotic lfuid after foetuses were scanned by MRI, which should be used as an effective clinical method to measure the fetal amniotic lfuid.
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