MRI快速扫描序列在颈部磁共振扫描中的运用

目的对并行采集技术IPAT和常规颈椎MRI扫描两种方法进行对比分析.方法将48例病例均经常规颈椎矢状位快速自旋回波序列(TSE)T1和T2及横轴位反转恢复(TIRM)序列扫描,随后即行并行采集序列(IPAT)的矢状位T1和T2扫描.利用自身2组数据比值进行统计学分析.结果 48例颈椎MRI图像均达到诊断标准,其中IPAT序列矢状位T2W扫描时有1例在出现吞咽伪影,常规序列矢状位T2W和T1W扫描图像有4例出现吞咽伪影,矢状位T1和T2两组数据分别运用SPSS 11.0统计学软件进行成对资料的t检验,发现2组扫描间相差不显著(t=1.288,P>0.05).结论 IPAT序列是运用多线圈采集后对所得信号进行处理从而获取的图像.通过比较2组扫描的参数、图像质量和磁共振信号,发现IPAT扫描时间短,图像质量良好.

Fast scan sequence of MRI in cervical vertebra

Objective To contrast and evaluate integrated parallel acquisition techniques(IPAT) and routine scan sequence of MRI in cervical vertebra.Methods Forty-eight patients who needed cervical vertebra scanning underwent first a sagittal TSE scan and a transverse TIRM scan, then a sagittal IPAT scan.The data of image signals were gained respectively,and the rate of tissue signals to local signals was calculated and analyzed statistically with the MRI software.Results All 48 serial images achieved diagnostic standard.Among them,one of the sagittal T2WI scan in IPAT and four of the sagittal T1WI and T2WI in routine scan sequence had swallowing constructed defects.The data of sagittal T1WI and T2WI were performed a t-test with SPSS respectively,resulting in no apparent distinction(t=1.288,P>0.05).Conclusion IPAT sequence can gain super images in less time with more coils.IPAT sequence needs the distance between coil and checkpoint larger than 5 mm.MRI scan for vertebra just fit it.We think cutting scan time is a direct and effective method to decrease constructed defect.