【摘 要】目的：总结鼻咽癌调强放疗前后MRI影像的变化与疗效评估价值。方法：选择2015年3月——2018年1月我院收治的鼻咽癌患者50例作为研究对象，本组病例均于治疗前后给予MRI检查，并比较治疗前后MRI影像学变化及患者治疗效果。结果：MRI在治疗前T1WI表现为等信号，T2WI表现为稍高信号，DWI则呈现高信号表现；完成治疗后MRI检查显示，T2WI为不均匀高信号，T1WI为低信号，DWI为信号逐渐减低，相较于治疗前，治疗后增强扫描表现为不均匀强化；通过调强放疗治疗总有效率为94.00%(47)；术后表现为纤维化斜率显著低于复发病例，差异存在统计学意义(P<0.05)。结论：在鼻咽癌的诊断中，MRI检查有助于准确显示病灶范围，以此协助治疗靶区的勾画，通过对病灶形态改变实现调强放疗可收获更加理想疗效，同时在手术后对纤维化与复发有效鉴别诊断，值得临床推广应用。。

    【关键词】鼻咽癌；调强放疗；MRI；影像学特征；疗效评估

    Study on the change of MRI image and the value of curative effect before and after intensive radiotherapy for nasopharyngeal carcinoma

    Li Yue(Shifang people's Hospital Sichuan Deyang 618400)

    Abstract Objective： To summarize the changes of MRI image before and after intensive radiotherapy of nasopharyngeal carcinoma (NPC) and evaluate the value of its curative effect.Methods： 50 patients with nasopharyngeal carcinoma (NPC) admitted in our hospital from March 2015 to January 2018 were selected as study subjects. All patients were examined with MRI before and after treatment ......