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Summarized receiver operating characteristic (SROC) curves of FDG PET/CT and PET/MRI for detecting lymph node metastasis (A) and distant metastasis (B). Each circle represents the sensitivity and specificity of each of the included studies. The diamond is the summary point for the average sensitivity and specificity estimates. The ellipse with the dashed line is the 95% confidence region, and the ellipse with the dotted line is the 95% prediction region.
