摘要
目的本研究的目的在于探讨3.0T磁共振LAVA-FLEX动态增强扫描序列在肛瘘诊断及分型中的应用价值。方法术前行普通序列和LAVA-FLEX动态增强扫描序列,统计分析不同扫描序列及动态增强扫描序列各期对肛瘘内口及瘘管的检出率。结果对照手术结果,在肛瘘内口及瘘管显示率上,AX LAVA+C显示率最高,AX LAVA平扫显示率最低,8种序列按序排列依次为AX LAVA+C、COR LAVA+C、AX DWI、SAG LAVA+C、AX T2WI/FS、COR T2WI/FS、SAG T2WI/FS、AX LAVA,总体进行X2检验,P<0.001,差异有显著性意义。在内口及瘘管的显示上,T2WI/FS与LAVA增强序列对比来看,无论从内口的显示来看,还是从瘘管的显示来看,LAVA增强序列都优于T2WI/FS(P分别为0.006、0.005),差异具有统计学意义。结论LAVA-FLEX增强MRI扫描检查方法能准确定位各型肛瘘内口、走向,能准确显示与周围组织的关系,分型较为客观准确,是术前诊断各型肛瘘的一种值得推广的扫描方法。
Objective It was to assess the application value of LAVA-FLEX sequences in determining the type of anal fistula and it was also to study the characteristics in dynamic inhancement phases.Methods 31 patients with surgically proved anal fistula underwent MRI examination.The following sequences were obtained： sagittal T2WI/FS、T2WI/FS axial、T2WI/FS coronary、DWI、LAVA-FLEX, sagittal、axial and coronary LAVA-FLEX ＋ C. Statistical analysis with surgical results was refered as standards.The value of MRI with various sequences in the diagnosis of various types of anal fistulas and their enternal openings was statistically analyzed according to surgical results. SPASS 17.0 software package was used to perform X2 test,t test,analysis of variance and there was statistically significant（P〈0.05）.Results On the display for internal openings and anal fistula,it showed highest rates reaching up to 88.09% and 87.8% in the AX LAVA-FLEX ＋C.It showed 8 sequences as follows： AX LAVA＋C、COR LAVA＋C、AX DWI、SAG LAVA＋C、AX T2WI/FS、COR T2WI/FS、SAG T2WI/FS、AX LAVA.It performed X2 test, the results of interal openings： X2=28.886,P1=0.000, P1〈0.001,the results of anal fistula： X2=42.352,P1=0.000, P1〈0.001, The difference was statistically significant. LAVA-FLEX inhanced sequence was better than T2WI/FS（P=0.006、0.005）, there was statistically significant difference.It was compared with 6 phases ,contrast noise ratio showed from high to low equilibrium phase、venous phase、late arterial phase、coronal phase、early arteral phase、sagittal phase、plain phase.Conclusion It showed highest rate in AX LAVA＋C for kinds of sequences in MRI for ana fistula. It showed highest for contrast noise ratio in the equilibrium phase.
出处
《中国CT和MRI杂志》
2015年第6期80-83,共4页
Chinese Journal of CT and MRI
