摘要
目的分析放射性脑损伤的MRI表现。方法回顾性分析2000年9月～2005年5月就诊于该科的15例放射性脑病的MRI资料,10患者均因头颈部肿瘤接受过1、2疗程的放疗,MRI资料包括平扫与增强扫描,3例因疑肿瘤复发而经手术确诊为放射性脑损伤。结果急性放射性脑损伤表现为大片状水肿,T1WI上为低信号,T2WWI为高信号,增强后无异常强化。慢性期表现平扫T1WI为大片状低信号,T2WI为大片状高信号,增强后表现为珊瑚状、地图状和环状等不规则形。结论放射性脑损伤表现为水肿与占位效应,慢性期除水肿外,增强T1WI表现为特殊形态的强化。
[Objective] To analyze magnetic resonance imaging （MR]） representations of radiation-induced brain injury. [Methods] MRI imagings of 15 patients who had suffered from radiation-induced brain injury were reviewed. All the patients received 1 or 2 radiotherapy periods during September 2000 to May 2005 because of the head and neck cancers. They underwent MR scan with T2-weighted sequences in the axial plane and Tl-weighted sequences in both axial and sagittal plane. All the patents were also examined with Gd-DTPA enhanced MRI. 6 patents who were suspected recurrence in MRI scans but were confirmed radiation-induced brain injury after excisions. [Results] Acute radiation-induced brain injury shows as large patch edema, which was low signal intensity on T1-weighted imaging and high intensity on T2 weighted imaging. Delayed radiation-induced brain injury manifested edema and space occupying signs, with irregular shapes and sizes enhancedment. [Conclusions] MR] revealed edema of the brain in all radiation-induced brain injuries, during acute phase, no enhancement are seen. But in delayed phase, the edema aggravated, lesions enlarged, with irregulat shapes like coral, map, or ring in enhanced scans.
出处
《中国现代医学杂志》
CAS
CSCD
北大核心
2006年第18期2815-2818,共4页
China Journal of Modern Medicine
关键词
放射性脑损伤
磁共振成像
诊断
radiation-induced brain injury
magnetic resonance imaging
diagnosis
