当前位置:首页 > 期刊 > 《癌症》 > 1999年第4期 > 正文
编号:10238395
鼻咽癌放疗后的MRI表现
http://www.100md.com 《癌症》1999年第4期
鼻咽肿瘤|辐射损伤|磁共振成像
     作者:梁碧玲 沈君 林云崖

    单位:梁碧玲 沈君 中山医科大学孙逸仙纪念医院放射科(广州,510120);林云崖 中山医科大学附属三院放射科(广州,510630)

    关键词:鼻咽肿瘤;辐射损伤;磁共振成像

    癌症990427

    【摘要】目的:探讨MRI在评价NPC放疗后改变中的作用。方法:对42例NPC放疗后患者行MRI检查,其中15例为RF,21例RNPC,3例RF及3例RNPC伴有局部淋巴结转移,病例经病理活检或针吸细胞学检查或随访追踪证实。MRI扫描使用0.5T超导型磁共振成像仪,常规SE序列T1、T2加权横断、冠状、矢状位成像,其中34例(16例RNPC,18例RF)加行Gd-DTPAT1W增强扫描。结果:21例(21/21)RNPC、8例(8/18)RF在T2WI上表现为高信号;16例RNPC(16/16)及1例RF(1/18)有强化,12例(12/16)RNPC呈均匀强化;RF随时间演变信号变化大;咽旁淋巴结增大8例,2例为良性,6例为转移癌。结论:T2WI对鉴别RF与RNPC有一定价值,而Gd-DTPA增强扫描价值重大。对于NPC有咽旁淋巴结增大者应常规使用增强扫描以确定其为良性增生或淋巴结转移癌。

    中图分类号:R739.63 文献标识码:A 文章编号:1000-467X(1999)04-0443-04

    Magnetic resonance imaging of post-radiation nasopharyngeal carcinoma

    LINAG Bi-ling1,SHEN Jun1,LIN Yun-ya2

    1.Dept. of Radiology ,Sun Yat-sen Memorial Hospital,Sun Yat-sen University of Medical Sciences,Guangzhou 510120, P.R.China

    2.Dept. of Radiology,the Third Affiliated Hospital of Sun Yat-sen University of Medical Sciences,Guangzhou 510630, P.R.China

    【Abstract】 Objective:To define the usefulness of MRI in the evaluation of the NPC. Method:Forty two patients of NPC after radiation had MR imaging. Among them ,15 cases were proved to be RF,21 RNPC,3 RF and 3 RNPC both with regional lymphatic metastasis through pathological biopsy or cytological smear or follow-up. Images were obtained with a 0.5 T superconducting magnet imaging system in transverse ,coronal and sagittal planes with T1-and T2-weighted spin echo sequences.Thirty-four of them including 16 cases of RNPC and 18 RF had an additional T1-weighted contrast enhanced imaging after iv injection of Gd-DTPA. Results:The lesions of all 21 cases (21/21) with RNPC and 8 cases (8/18) with RF showed high signal intensity on T2-weigthed images respectively. Sixteen cases of RNPC (16/16) and only 1 case of RF(1/18) manifested increased signal intensity lesions on T1-weigthed images after iv injection of Gd-DTPA. Lesions of RF exhibited a high degree variety of signal intensity. Lymphadenopathy of parapharyngeal space occurred in 8 patients,2 cases due to benign processes and 6 cases lymphatic metastasis. Conclusions:T2-weighted sequences had limited value in differentiation RF from RNPC, then ,contrast enhanced MR proved important and significantly valuable in this aspect. MR with Gd-DTPA is recommended for lymphadenopathy of parapharyngeal space to define whether it is caused by benign processes or metastatic carcinoma. ......

您现在查看是摘要页,全文长 11173 字符