探讨 DWI 成像对于各型胎盘植入的诊断价值

目的：探讨 DWI 成像对于各型胎盘植入的诊断价值，并与常规 T2WI 对比，分析其诊断效能。材料与方法：选取我院2011年6月至2014年8月胎盘植入患者共45例进行常规 T2WI 和 DWI 扫描，其中 DWI 分别使用b 值0s/mm2、500s/mm2、1000s/mm2三个扫描参数。采用方差分析的方法比较各 b 值组之间胎盘植入区域与子宫肌壁区域的信号强度比（SI Ratio），然后以病理诊断为标准，选取具有最高 SI Ratio 的 b 值组与常规 T2WI 对比，分析其对于三种病理类型胎盘植入的诊断效能。结果：45例患者中12例为粘连性胎盘，21例为植入性胎盘，12例为穿透性胎盘。当 b 值选取1000s/mm2时，胎盘植入区域与子宫肌壁区域的 SI Ratio 最高（5.87±1.25），与 b 值0s/mm2及500s/mm2相比，差异有统计学意义。当 b 值为1000s/mm2时，DWI 图像对于粘连性胎盘，并不比常规 T2WI 好，但是对于植入性胎盘和穿透性胎盘，DWI 明显好于常规 T2WI。结论：当 b 值选取1000s/mm2时，DWI 对于胎盘植入具有较高的显示效果，比常规 T2WI 更具有临床诊断价值，为临床治疗提供可靠的依据。

Investigate The Diagnostic value of DWI Imaging In The Pla centa Implantation

Objective To investigate the diagnostic value of DWI imaging inthe placenta implantation, and to analyze di-agnostic efficiency compared with conventional T2WI. Material and method 45 patients with placenta implantation from June 2011 to 2014 August were enrolled in this study. All of the patients had undergone conventional T2WI and DWI exa minations. Using variance analysis to compare the different b value group between the signal intensity of placenta implantation and uter-ine muscle wall region signal intensity ratio. Using the pathological diagnosis as the standard, we selected the highest Si ratio b value group to compare with the conventional T2WI group. Results Of the 45 patients, 12 were adhesive placenta, 21were implanted placenta, and 12 were penetrating placenta. When the b value of 1000s/mm2, placenta implantation and uterine muscle wall region of the Si ratio was the highest (5.87 + 1.25), which was higher than b value of 0s/mm2, and 500s/mm2. When the b value of 1000s/mm2, the DWI images for placenta accreta was similar to conventional T2WI, but for placenta accreta and placenta percreta, DWI was better than conventional T2WI. Conclusion When the b value of 1000s/mm, the DWI for placenta implantation has high display effect and more clinical diagnostic value than conventional T2WI, which provide a reliable basis for clinical treatment.