Abstract:Objective: To compare the diagnostic value of 18F-prostate specific membrane antigen (PSMA)-1007-labeled positron emission tomography fusion computed tomography (PET/CT) and 18F-deoxyglucose (FDG) PET/CT imaging for bone metastasis of prostate cancer. Methods: The clinical data of 30 prostate cancer patients admitted to the department of nuclear medicine of the General Hospital of Northern Theater Command from December 2020 to December 2022 were retrospectively analyzed, and all patients underwent 18F-PSMA-1007 PET/CT imaging and 18F-FDG PET/CT imaging test. The ROC curves were used to analyze the difference in diagnostic threshold and diagnostic efficacy of the maximum standardized uptake value (SUVmax) for bone metastases between the two methods; the weighted Kappa test was used to analyze the agreement between the diagnostic results of the two physicians. Results: A total of 215 positive lesions were found in 30 patients, including 30 prostate cancer lesions and 185 bone metastases. The area under the ROC curve for SUVmax of prostate cancer lesions and bone metastases visualized by 18F-PSMA-1007 and 18FFDG PET/CT were 0.88, 0.96 and 0.81, 0.93, respectively. The sensitivity, specificity, positive predictive value, negative predictive value and accuracy of 18F-PSMA-1007 and 18F-FDG PET/CT in diagnosing prostate cancer bone metastases were 94.62%, 66.67%, 98.32%, 37.50%, 93.33% and 82.35%,50.00%,97.47%,10.81%,81.02%, respectively. The differences in sensitivity, negative predictive value, and diagnostic compliance between two methods were statistically significant (all P<0.05). Conclusion: 18F-PSMA-1007 PET/CT is a better diagnostic tool for primary prostate cancer bone metastasis, which is evidenced by that the sensitivity and accuracy of the diagnosis of prostate bone metastasis were higher than those of 18F-FDG PET/CT.
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