中晚期胰腺癌的CT和MRI诊断
胰腺癌；体层摄影术,X线计算机；磁共振成像,,],胰腺癌；体层摄影术,X线计算机；磁共振成像,1资料和方法,2结果,3讨论,参考文献：
[摘 要] 目的：探讨中晚期胰腺癌的CT和MRI诊断价值。方法：回顾性分析34例经手术或病理证实的中晚期胰腺癌患者的CT和MRI检查资料。结果：中晚期胰腺癌的影像表现为胰腺肿块，肿块与正常肝实质相比，在T1加权像呈低信号，T2加权像呈高信号，CT平扫呈低密度，MRI信号强度和CT密度不均匀，增强扫描轻度强化，可见坏死及囊变，胰、胆管扩张，双管征，邻近血管和脏器受侵，肝脏和腹膜后淋巴结转移。结论：CT和MRI检查对中晚期胰腺癌的诊断及鉴别诊断具有重要意义，可判断手术可切除性和预后。[关键词] 胰腺癌；体层摄影术/X线计算机；磁共振成像
CT and MRI Diagnosis of Late and Midtrimester Pancreatic Cancer
ZHANG Shike，JIANG Haiyan，GUAN Tianming (The People Hospital of Huiyang District,Huizhou,Guangdong 516211，China)
Abstract：Objective To study the diagnostic value of CT and MRI on late and midtrimester pancreatic cancer.Methods MRI findings of pancreatic cancer in 34 cases were analyzed retrospectively.Results The imaging feature of late and midtrimester pancreatic cancer was pancreatic mass.The pancreatic caner mass showed slightly low signal on T1WI and slightly high signal on T2WI compared with the liver parenchyma.On plain CT scan,the pancreatic caner mass showed hyperdensity.The MR signal and CT density were nonhomogeneous.There was slightly enhancement when contrast was given.The necrosis and cystic changing,double canal sign and cholangiectasis can be seen.The IVC and the superior mesenteric artery and vein can be invasived.Heptic hilum and retroperitoneal lymph nodes metastases.Conclusion MRI examination had importmant value on the diagnosis and differential diagnosis of late and midtrimester pancreatic cancer,the probability of surgery operation and the prognosis of the patients. ......
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