磁共振扫描在胃癌术前TN分期中的应用研究

MR Detection of TN - staging in Gastric Cancer

目的:评价磁共振在胃癌术前TN分期中的价值。方法:26例经胃镜活检确诊的患者术前行磁共振成像,MR动态增强图像、DWI图像对胃癌术前TN分期评估,并与术后病理结果对照。结果:MR对胃癌T分期诊断的准确率为76.9%。MR对胃周转移淋巴结的检出率为41.8%,胃癌病变的表面扩散系数(ADC)值较相应正常胃壁的ADC值偏低(P=0.145)。胃癌病变ADC值与浆膜浸润差异有统计学意义(P=0.036<0.05)。结论:MRI能对胃癌术前TN分期做出准确的判断。

Purpose：To prospectively evaluate the accuracy of magnetic resonance（MR） imaging in the TN staging of gastric carcinoma in comparison with histopathology.Methods：Twenty - six patients with endoscopic diagnosis of gastric carcinomas underwent preoperative MR imaging,including plain scan and dynamic contrast enhancement.The results were compared with pathology findings.Results：Accuracy of MR imaging was 76.9%in identifying T staging and the accuracy for detecting lymph nodes was 41.8% .ADC value of normal gastric wall was slightly lower than that of gastric cancer wall.No significant difference was found between the ADC values of metastasis lymph nodes and gastric cancer lesions. There was significant difference between the ADC values of membrane with and without gastric cancer infiltration.Conclusion：Dynamically enhanced and delayed MR combined with DWI play a very important role in TN - staging of gastric cancer.