高场MRI检查不同扫描序列对胃癌术前T分期的诊断效能对比

Comparison on Diagnostic Efficacy of Different Scanning Sequences of High Field MRI for Preoperative T Staging of Gastric Cancer

目的探讨高场MRI检查不同扫描序列对胃癌术前T分期的诊断效能。方法选取我院2017年4月至2019年1月收治的胃癌患者67例,67例患者手术前均进行MRI检查,以术后病理检查结果为对照,计算MRI常规序列、常规序列结合弥散加重成像(DWI)、常规序列结合DWI与动态增强MRI(DCE-MRI)序列检查诊断术前T分期符合率。结果MRI常规序列对胃癌T分期的总诊断符合率62.68%(42/67),T_(1)-4期诊断符合率分别为45.45%、60.86%、69.56%、70.00%;常规序列结合DWI序列对胃癌T分期的总诊断符合率为76.11%(51/67),T_(1)-4期诊断符合率分别为63.63%、73.91%、82.60%、80.00%;常规序列+DWI+DCE-MRI序列对胃癌T分期的总诊断符合率为91.04%(61/67),明显高于常规序列、常规序列+DWI检查(P<0.05),T1-4期诊断符合率分别为90.90%、86.95%、91.30%、100.00%。结论常规序列+DWI+DCE-MRI序列可有效提高对胃癌T分期的诊断效能。

Objective To investigate the diagnostic efficacy of different scanning sequences of high field MRI for preoperative T staging of gastric cancer.Methods 67 patients with gastric cancer admitted to our hospital from April 2017 to January 2019 were selected.All patients underwent MRI before operation.Results The results of postoperative pathological examination were used as contrast to calculate the accuracy of MRI routine sequence,routine sequence combined with diffusion-weighted imaging(DWI),routine sequence combined with DWI and dynamic enhanced MRI(DCE-MRI)sequence for preoperative T staging.The overall diagnostic accuracy of MRI routine sequence for T staging of gastric cancer was 62.68%(42/65),and the diagnostic accuracy for T_(1-4) staging was 45.45%,60.86%,69.56%,70.00%,respectively.The total diagnostic accuracy of routine sequence combined with DWI sequence for T staging of gastric cancer was 76.11%(51/67),and the diagnostic accuracy for T_(1-4) staging was 63.63%,73.91%,82.60%,and 80.00%,respectively.The total diagnostic accuracy of routine sequence+DWI+DCE-MRI sequence for T staging of gastric cancer was 91.04%(61/67),which was significantly higher than that of routine sequence and routine sequence+DWI(P<0.05).And the diagnostic accuracy for T_(1-4) staging was 90.90%,86.95%,91.30%,and 100.00%,respectively.Conclusion The conventional sequence+DWI+DCE-MRI sequence can effectively improve the diagnostic efficacy for T staging of gastric cancer.