静息态BOLD-fMRI评价鼻咽癌放疗后脑损伤的应用价值

目的 分析静息态血氧水平依赖功能磁共振成像(BOLD -fMRI)对于鼻咽癌放疗后早期脑损伤的诊断价值.方法 收集4组放疗前(G0)、放疗后0~3个月(G1)组、放疗后3~6个月(G2)组及放疗后6~9个月(G3)组鼻咽癌患者进行静息态扫描,通过基于Matlab软件的DPARSF工具进行G1与G0、G2与G0、G3与G0,、G2与G1、G3与G2、G3与G1整理分析及后处理.结果 G1组与G0组相比两侧海马及颞叶的活动降低,一致性减少,而G2组与G0组相比两侧海马及颞叶的活动也降低,但幅度小,较G1组相比有回升,G3组也有回升,但没有恢复到放疗前水平.结论 静息态BOLD-fMRI的异常改变对于早期诊断鼻咽癌患者的放射性脑损伤具有一定临床意义.

Evaluation of the value of resting state BOLD-fMRI in radiation-induced brain injury after nasopharyngeal carcinoma radiotherapy

Objective To analyze the value of resting state BOLD-fMRI in the early diagnosis of brain injury after nasopharyngeal carcinoma radiotherapy.Methods Four groups of nasopharyngeal carcinoma patients,including before radiotherapy group (G0),0-3 months after radiotherapy group (G1), 3-6 months after radiotherapy group (G2) and 6-9 months after radiotherapy group (G3),were underwent a resting state BOLD-fMRI scan, and Matlab software DPARSF tool was used to analyze and postprocess the data based on G1-G0,G2-G0,G3-G0,G2-G1,G3-G2 and G3-G1.Results Compared with the G0 group,the activity of bilateral hippocampus and temporal lobes was decreased in G1 and G2 groups,and the decreased degree in G2 group was smaller than that in G1 group.Compared with G1 group,brain metabolic activity increased in G2 and G3 group,but did not return to the initial level before radiotherapy.Conclusion Abnormal changes of resting state BOLD-fMRI have an important clinical significance in early diagnosis of radiation-induced brain injury after nasopharyngeal carcinoma radiotherapy.