3.0T磁共振B-FFE和SWI序列在胎儿脊柱成像中的对比研究  

Comparative Study of 3.0T Magnetic Resonance B-FFE and SWI Sequence in Fetal Spine Imaging

作　　者：李鸿恩 林兴[1] 王霞[1] 曾益辉 江魁明[1] 张嫣[1] LI Hong-en;LIN Xing;WANG Xia;ZENG Yi-hui;JIANG Kui-ming;ZHANG Yan(Department of Radiology,Guangdong Women's and Children's Hospital,Guangzhou 51000,,Guangdong Province,China)

机构地区：[1]广东省妇幼保健院放射科,广东广州510000

出　　处：《中国CT和MRI杂志》2023年第2期158-160,共3页Chinese Journal of CT and MRI

基　　金：广州市科技计划项目基金资助(202002030217)。

摘　　要：目的 研究3.0T磁共振平衡式快速场回波(balance fast field echo,B-FFE)和磁敏感加权成像(susceptibility weighted imaging,SWI)序列在胎儿脊柱方面的诊断价值,为产前诊断提供数据分析及参考。方法 甄选我院2019年10月至2020年3月产前诊断提示胎儿脊柱异常并已行超声检查54例孕妇。采用3.0T磁共振进行胎儿脊柱扫描,扫描序列包括轴冠矢三个位置的B-FFE和SWI序列,对两个序列诊断准确率、检查成功率进行对比分析,记录两序列特异性吸收率(the specific absorption rate,SAR)值。结果 54例患者中,B-FFE、SWI序列组诊断准确率分别为88.88%、70.37%,差异具有统计学意义(χ^(2)=5.708,P<0.05)。检查成功率方面:B-FFE、SW序列成功率分别为92.59%、55.56%,差异具有显著统计学意义(χ^(2)=21.027,P<0.001)。SAR值方面:B-FFE、SWI序列分别为2.0±0.05w/kg、<0.1 w/kg。结论 B-FFE与SWI序列对比,两者均能很好的显示胎儿脊柱问题图像,都具有较高的诊断准确率。B-FFE序列检查成功率更高、能获得稳定、清晰图像,在显示胎儿脊柱轮廓稍逊于SWI序列,SWI在显示胎儿腰骶段具有绝对优势,但检查成功率较低,两者结合扫描,能大大提高胎儿脊柱影像诊断准确率及检查完成率。Objective To study the diagnostic value of 3.0T MRI balance fast field echo(B-FFE) and susceptibility weighted imaging(SWI) sequence in fetal spine,for prenatal diagnosis Provide data analysis and reference. Methods A total of 54 pregnant women were selected from October 2019 to March 2020 in our hospital with prenatal diagnosis indicating fetal spinal abnormalities and ultrasound examinations. Use 3.0T magnetic resonance to scan the fetal spine. The scan sequence includes the B-FFE and SWI sequences at the three positions of the axial coronal vector. The diagnostic accuracy and inspection success rate of the two sequences are compared and analyzed,and the specific absorption rate of the two sequences is recorded the specific absorption rate(SAR) value. Results Among 54 patients,the diagnostic accuracy rates of B-FFE and SWI sequence groups were 88.88% and 70.37%,respectively,and the difference was statistically significant(χ^(2)=5.708,P<0.05). In terms of inspection success rate: The success rates of B-FFE and SW sequences were 92.59% and 55.56%,respectively,and the difference was statistically significant(χ^(2)=21.027,P<0.001). In terms of SAR value: B-FFE and SWI sequences were 2.0±0.05 w/kg and <0.1 w/kg,respectively. Conclusion B-FFE and SWI sequence comparison,both can display images of fetal spinal problems very well,and both have a high diagnostic accuracy rate. The B-FFE sequence examination has a higher success rate and can obtain stable and clear images. It is slightly inferior to the SWI sequence in showing the fetal spine contour. SWI has an absolute advantage in showing the lumbosacral segment of the fetus,but the examination success rate is lower.,It can greatly improve the accuracy of fetal spine imaging diagnosis and the completion rate of examination.

关 键 词：3.0T磁共振 胎儿脊柱 B-FFE SWI 

分 类 号：R445.2[医药卫生—影像医学与核医学]