Table 4: Measures of diagnostic performance using 18F-NaF PET/CT or 18F-FDG PET/CT to detect osseous metastatic lesions of patients with nasopharyngeal carcinoma.

TPFPTNFNSensitivity (%)Specificity (%)PPV (%)NPV (%)Accuracy (%)

18F-NaF PET/CT1741223398.365.793.488.592.9
18F-FDG PET/CT7613410142.997.198.725.251.9

TP: true positive; FP: false positive; TN: true negative; FN: false negative.