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The sensitivity of MRI in the diagnosis of spinal metastases was 78.13%, and specificity was 56.25%. The sensitivity of PET/CT for the diagnosis of spinal metastases was 92.19%, and specificity was 78.95%. The specificity and positive predictive value of PET/CT for the diagnosis of spinal metastases were not significantly different from those of MRI (P 0.05). The sensitivity, accuracy and negative predictive values were significantly higher than those of MRI (P less then 0.05). PET/CT is superior to MRI in the diagnosis of spinal metastases, and its sen