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目的探讨MRI在胎儿消化系统发育异常方面的应用价值。资料与方法对10例孕20周以上超声提示存在消化系统发育异常的胎儿行MR检查。采用单次激发快速自旋回波序列(SSFSE),选择胎儿头颅、躯干的常规体位,并重点行胎儿躯干横断位、冠状位、矢状位扫描,将产前MR表现与引产后尸体解剖结果相对照。结果 10例消化系统发育异常胎儿中,先天性小肠闭锁2例;引产后尸检证实闭锁部位分别为空肠近段和回肠中段,后者同时合并胎儿腹腔积液,SSFSE上见扩张肠管以高信号为主;先天性肛门闭锁5例,SSFSE上扩张肠管内可见低信号胎粪;膈疝2例,均位于左侧,疝入物1例为胃腔、1例为部分肠管,MR图像上表现为高信号胃腔、肠管上升至心脏水平;腹部包块1例,引产后证实为先天性肠系膜囊肿,表现为腹腔内高信号囊性包块。结论 MRI在胎儿消化系统发育异常方面具有一定的诊断价值。
Objective To explore the value of MRI in the development of fetal digestive system disorders. Materials and Methods 10 fetuses with gestational age greater than 20 weeks who had ultrasound digestive tract dysplasia were examined by MR imaging. Single-shot rapid spin echo (SSFSE) was used to select the fetal head and trunk of the conventional position, and focus on fetal torso transection, coronal, sagittal scan, the prenatal MR performance and post-abortion post-mortem findings Control. Results 10 cases of digestive system dysplasia in fetus, congenital small intestine atresia in 2 cases; post-labor autopsy confirmed the proximal jejunum and jejunum ileum, respectively, the latter combined with fetal ascites, SSFSE see the expansion of the bowel to high signal In 5 cases of congenital anal atresia, low-signal meconium was observed in the SSFSE. 2 cases of diaphragmatic hernia were located on the left side. One case of hernia was the gastric cavity and one part of the intestine. The MR images showed high Signal gastric cavity, bowel increased to the level of the heart; 1 case of abdominal mass, induced abortion was confirmed as mesenteric cyst, manifested as intra-abdominal high signal cystic mass. Conclusion MRI has some diagnostic value in the development of fetal digestive system.