鼻咽癌放疗前后转移淋巴结的MRI分析  

MRI Evaluation of Lymph Node metastasis in Nasopharyngeal Carcinoma (NPC) Patients Pre-and Post Radiotherapy

作　　者：田野[1] 宋建荣[1] 钱铭辉[1] 

机构地区：[1]苏州医学院附属第二医院,215004

出　　处：《实用放射学杂志》1996年第9期523-526,共4页Journal of Practical Radiology

摘　　要：28例鼻咽癌在放疗前和放疗后一个月内作了MRI检查，放疗前触诊和MRI分别检出36和60枚阳性淋巴结，其差别主要是MRI能发现咽后和都分上颈深区淋巴结并能准确地测量出淋巴结的大小；转移淋巴结在T_1像上表现为与肌肉一致的等信号，T_2像上为类似于脂肪组织的不均匀性高信号，Gd-DTPA增强后出现明显的不均匀强化现象，与鼻咽部原发病灶有类似表现。放疗后MRI图像上有83％的颈淋巴结信号强度基本正常，而鼻咽部信号强度正常者占64％，MRI检查的结果使得对鼻咽癌患者颈淋巴结转移的随访更有针对性。MRI was executed in 28 NPC patients before and after rediation treatment.In pre-radiotherapy,36 cervical lymphnodes were suspected involvement by clinical palpation.In MRI,becouse more cervical adenopathy were detected in lateral retropharyngeal and high internal jugular regions,there were 60 positive lymphnodes.It exhibited isointense with surrounding muscle on the T1-weighted and markedly inhomogeneity hyperintense on the T2-weighte images,and there were clearly enhancement of the lesion after Gd-DTPA administration.At the conclusion of therapy,it was shown that the complete signal intensity normalization frequency was 83% in lymphnodes and 67% in nasopharynx.

关 键 词：鼻咽肿瘤 颈淋巴结 放射疗法 MRI 

分 类 号：R739.630.5[医药卫生—肿瘤]