婴幼儿颅脑MRI扫描技术的探讨

1目的探讨婴幼儿颅脑MRI扫描技术及其显示病变的诊断价值。方法对55例婴幼儿进行颅脑MRI检查，所用序列为T1WI Sag，T2WI Tra，T1wI Tra、FLAIR Cor，DWI Tra，全部检查时间为8分30秒。评价图像显示灰白质等结构的对比，观察不同病变的MRI表现。结果55例患儿52例图像达到诊断要求，成功率为92％。正常足月婴儿15例表现为脑干、丘脑、基底节T1WI高信号，T2WI低信号。早产儿13例表现为脑回变平，脑沟浅而不清。新生儿缺血缺氧性脑病15例中，脑白质出血灶表现为局灶性T1WI高信号、T2WI低信号，脑软化灶表现为皮质下、白质、室管膜下T2wI低信号，T2WI高信号。外伤、脑发育畸形等均可显示其病变。结论颅脑MRI扫描技术能显示婴幼儿脑组织结构、髓鞘形成情况及各种病变，具有重要的-临床应用价值。

Study on Infant Brain MRI Scan Techniques

Objective To evaluate infant brain MRI scan techniques and the diagnostic value in displaying focuses. Methods Brain MRI scanning were performed to 55 infants. The adopted sequences were TIWI Sag, T2WI Tra, TI WI Tra, FLAR Cor and DWI Tra. The total time of examination was 8 minutes and 30 seconds. The contrast of gray matter and white matter of brain was evaluated and manifestations of various diseases were observed. Results Of 55 cases, images of 52 cases met the qualification to diagnose, and the successful rate was 92%.The brain stem, thalamus and basal ganglia of 15 normal matuxe infants were showed high signal in T1WI and low signal in T2WI. Flatten gyrus and shoal brain channel was showed in 13 immature infant. In 15 cases with hypoxic ischemic encephalopathy, newborns with white matter bleeding showed focal high signal in TIWI and low signal in T2WI, and newborns with brain soften focus showed local low signal in T1WI and high signal in T2WI sub cortex, in white matter and subependymal. The focuses of trauma and malformation of brain could be displayed in MRI. Conclusions Brain MR1 scan techniques could display brain structure, myelinization and various diseases. It had important clinical application values.