MRI在直肠癌诊断及术前分期中的价值探讨.doc

文档介绍：MRI在直肠癌诊断及术前分期中的价值探讨
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【摘要】目的探讨MRI在直肠癌诊断及术前分期中的价值。方法选择27例经外科手术和病理证实的直肠癌病例,所有病人均于术前进行MRI检查,MRI序列包括常规T1WI、T2WI及快速梯度回波脂肪抑制(FSPGR)。观察肿瘤大小和信号,周围浸润及淋巴结增大情况,将影像观察结果与外科手术和病理诊断结果进行比较。结果 T分期方面,MRI诊断淋巴结转移的敏感度为36%,%。结论应用MRI进行直肠癌术前诊断及分期,准确率较高,对临床手术方式的选择具有很好的指导意义。
【关键词】直肠癌诊断术前分期磁共振成像
[Abstract] Objective To discuss the purpose of this study to analyze the accuracy of MRI in the diagnosis and preoperative staging of the disease. Methods 27 patients with rectal cancer proved surgically and histologically between January to December of 2007 were studied. Each of them performed MRI before surgical operation. MRI study included T1WI, T2WI and FSPGR pulse sequences, size and signal intensity of tumor itself, surrounding infiltration, and lymph nodes around the rectum were observed,and the imaging findings pared with those from surgery and pathology. Results In the preoperative T staging, the accuracy of MRI was % rate. The specificity of regional lymph node invasion with MRI was % rate. Conclusion The accuracy of MRI is high accuracy in patients with rectal cancer, it is helpful for clinical .
[Key Words] rectal cancer; diagnosis; preoperative staging; MRI
目前,直肠癌术前分期常用的检查技术包括直肠镜、直肠超声、CT及MRI。MRI具有较高的软组织分辨力、多方位及无创性成像等特点,可为直肠癌病人术前分期提供更多的信息,从而得到越来越多外科医生的青睐。本研究通过对MRI术前诊断与术后病理进行对照,了解MRI在直肠癌术前诊断及术前分期的敏感度及特异度。
材料与方法
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