CT与MRI诊断鼻咽癌的对比研究

目的 探讨鼻咽癌向周围邻近结构侵犯的CT和MRI表现。并比较其诊断价值。方法 分析经病理证实的2l例NPC患者CT和MRI资料。结果 鼻咽癌瘤体T1WI等信号14例(66，7％)，T2WI高信号18例(85．7％)，增强T1WI高信号9例(100％)。CT、MRI显示鼻咽癌以下结构的浸润率有显著性差异：完全茎突后间隙、颅骨和海绵窦(P值分别为0．015，0.000和0．017)。副鼻窦检出率分别为14．3％和4．8％，但P值为0．143。其余结构两者检出无统计学差异。结论 以MRI为鼻咽癌患者首选影像学检查，可更准确了解肿瘤侵犯范围。

Competitively study of nasopharyngeal carcinoma diagnosis by CT or MRI

Objective To investigate CT and MRI features in the diagnosis of nasopharynged carcinoma(NPC) with the adjacent structures involvement out of nasopharynx ,and compare the value between CT and MRI in NPC.Methods Twenty-one cases with NPC proven by pathology were reviewed.All underwent CT and MRI examination in one week before treatment.Results The tumor of 14 cases (66.7%) displayed iso-intense signal intensity (compared with muscles) on T 1-weighed images,18 cases (85.7%) hyper-intense signal intensity on T 2-weighed images,9 cases (100%) hyper-intense signal intensity on contrast-enhanced T 1-weighed images.The involvement rates of the following structures which showed on CT and MRI had obviously different:whole post-styloid involvement,the skull base erosion and cavernous sinus (P=0.015,0.000,0.017,respectively).The rates of paranasal sinuses invasion were 14.3% by CT and 4.8% by MRI,but P value was 0.143.The others had no significance.Conclusion MRI is the preferred technique in NPC.