Abstract:

Abstract:Objective  To compare the effects between 18F-fluorodeoxyglucose(18F-FDG)PET-CT and MRI  in diagnosis of breast cancer．Methods 29 patients with suspicious masses in breast were selected,18F-FDG PET/CT and MRI scanning were performed and their pathological results were gotten within 10 d．The sensitivities,specificities and accuracies of PET/CT and MRI in detecting breast cancer were calculated by using surgery or biopsy results as diagnostic golden standard．Results 20 malignant and 9 benign breast lesions of the 29 patients were proven histologically after surgery or biopsy．The sensitivity，specificity and accuracy value obtained by MRI were 85.0％,66.7％ and 79.3％ respectively,and they  were 90.0％,88.9％ and 89.6％ for PET/CT．The accuracy of PET/CT was a little higher than that of MRI,but there was no significant difference between them (χ2=1.17，P>0.05). PET/CT found 3 patients with left infraclavicular lymph node metastasis and bone metastasis. Conclusion There is no significant difference between PET/CT and MRI in detecting breast cancer. But PET/CT is superior to MRI in evaluating distant metastasis and accurate staging to guide therapy.

Key words: breast neoplasms；positron emission computed tomography；magnetic resonance imaging