The Diagnostic Value of ~(99m)Tc-MDP SPECT/CT in Detecting the Metastasis Focus

Objective:To observe the diagnostic value of 99mTc-MDP SPECT/CT in detecting the metastasis focus.Method:81 patients with doubted bone or unexplained bone pain underwent whole body bone scan and SPECT/CT fusion imaging,the diagnostic value of both techniques were compared to the final-confirmed diagnosis.Result:55 of the 81 patients were confirmed as bone metastasis with 201 lesions,the last 26 were benign with 42 lesions.The coincidence rate of whole body bone scan and SPECT/CT of the were 67.3% and 100% respectively,and that of benign lesions were 61.5% and 96.2% respectively.SPECT/CT fusion imaging precluded 36 metastatic lesions,10 of which were radioactive pollution and 12 were soft tissue lesions and 14 were benign lesions.SPECT/CT fusion imaging detected 51 metastatic lesions compared to WBS.Conclusion:99mTc-MDP SPECT/CT fusion imaging is prior in locating the lesions and provide function and anatomy information.When doubted lesions are found in whole body bone scan,additional SPECT/CT fusion imaging was recommended.