Objective To study the value of dual-phase ~(18)F -FDG PET imaging, standardized uptake value(SUV) and retention index(RI%) in the diagnosis of malignancy.

目的探讨双时相~（18）F-FDG PET显像图像、标准摄取值（SUV）及储留指数（RI%）在恶性肿瘤诊断中的价值。

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Objective To explore etiological diagnostic value for pleural effusion with 18 F FDG PET image.

目的探讨PET显像对胸腔积液的病因诊断的价值。

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