【摘要】 目的 :探讨鼻咽癌放疗后颅神经损伤的原因及其MRI表现。材料和方法 :选择临床和MR资料完整的 4 6例病人进行回顾性分析。采用 1 0T型MR机 ,SE序列 ,行头颅、鼻咽部横轴位、冠状位和矢状位平扫以及增强扫描成像。结果 :( 1)颅神经第Ⅵ、Ⅴ、Ⅲ、Ⅻ对的损害占前四位。 ( 2 )鼻咽癌局部复发 3 1例 ,其中 2 7例鼻咽部有肿块 ,4例无肿块。 ( 3 )单纯放射性脑病 6例。 ( 4 )复发与放射性脑病并存的 9例。结论 :鼻咽癌放疗后颅神经损伤有肿瘤复发、放射性脑病和两者共存三方面原因。MR检查能清楚、准确显示其病变。更多还原

【Abstract】 Objective:To study MRI imaging of cranial nerve involvement after rediotherapy for nasopharyngeal carcinoma. Meterials and Methods:46 cases were selected.To use 1.OT MRI scaner,SE sequence,axial、coronal and sagittal tomography and contrast enhanced sean of head and nasoparynx were carried out. Results:(1)the involvement of the Ⅵ、Ⅴ、Ⅲ、Ⅻcranial nerves was most often.(2)31 patients have a relapse,in 27 cases of them there were tumors in the nasopharynx,in 4 cases,no tumor was found.(3)in 6 patients there was only radiation encephalopathy.(4)9 patients have recurence of tumor and radiation encephalopathy. Conclusions:Cranial nerve involvement after radiotherapy for nasopharygeal carcinoma have three reasons:tumor recur、radiation encephalopathy and both.MRI can accurately diagnose these reasons.更多还原