FDG PET或PET-CT与MRI判断鼻咽癌放疗后局部残留或复发价值荟萃分析

目的 比较氟标记脱氧葡萄糖(FDG)PET或PET-CT和MRI判断鼻咽癌放疗后局部残留或复发的价值.方法 检索Medline、Embase和Cochrane图书馆系统评价1995年1月至2009年8月相关FDG PET或PET-CT和MRI的原始文献.金标准为病理分析和(或)临床及影像学随访.2个人独立搜索文献和提取数据,分别计算出FDG PET或PET-CT与MRI的敏感性、特异性、汇总的受试者工作特征(SROC)曲线和Q*值.结果 17个FDG PET或PET-CT和10个MRI研究纳入分析,汇总的FDG PET或PET-CT与MRI的敏感性分别为0.935(95% CI=0.901～0.964)与0.792(95%CI=0.731～0.844),汇总的特异性分别为0.924(95% CI=0.898～0.945)与0.787(95% CI=0.746～0.825).PET或PET-CT的SROC曲线下面积明显大于MRI(0.966∶0.852;z=2.29,P<0.05).PET或PET-CT的Q*值明显高于MRI的(0.914∶0.783;z=2.94,P<0.05).结论 FDG PET或PET-CT在诊断鼻咽癌放疗后局部复发或残留的准确性高于MRI.

FDG PET or PET-CT versus MRI in detecting local residue or recurrence of nasopharyngeal carcinoma after radiotherapy: a meta-analysis

Objective To compare the value of 18 F-labeled deoxyglucose (FDG) PET or PET-CT with MRI in detecting local residue or recurrence of nasopharyngeal carcinoma after radiotherapy, by performing a meta-analysis of relevant trials.Methods A literature search was performed to English original articles about FDG PET or PET-CT and MRI in Medline, Embase and the Cochrane database from January 1995 to August 2009.The reference standard was histopathologic analysis and/or close clinical and imaging follow-up.Two reviewers searched articles and extracted data independently.Sensitivity, specificity,summary receiver operating characteristic curves (SROC), and the Q index for FDG PET or PET-CT and MRI were pooled, respectively.Results Seventeen studies about FDG PET or PET-CT and 10 studies about MRI were included in this meta-analysis.The pooled sensitivity of FDG PET or PET-CT and MRI were 0.935(95% CI= 0.901 -0.964) and 0.792 (95% CI= 0.731 -0.844), separately.The pooled specificity were 0.924 (95 % CI= 0.898 - 0.945) and 0.787 (95 % GI= 0.746 - 0.825), separately.Area under SROC curves of PET-CT or PET (0.966) was significantly larger than that of MRI (0.852) (z =2.29, P < 0.05).The Q * index estimates for PET-CT or PET (0.914) were significantly higher than for MRI (0.783)(z=2.94,P<0.05).Conclusions FDG-PET/PET-CT has higher accuracy than MRI in diagnosing local residue or recurrence of nasopharyngeal carcinoma after radiotherapy.