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《Chinese Journal of Medical Imaging Technology》 2011-01
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Dual-phase ~(18)F-FDG PET in the diagnosis of recurrence or metastasis of gastric cancer after surgery

SU Fu-yong1,SUN Ai-jun2,LIU Jian2,LI Jia-min2,DU Jing-bo2(1.Imaging Center,Jinan 106 Hospital,Jinan 250022,China;2.PET Center,Zibo Wanjie Hospital,Zibo 255200,China)  
Objective To observe the value of dual-phase 18F-FDG PET in the diagnosis of recurrence or metastasis of gastric cancer after surgical resection.Methods Fifty-five patients with gastric cancer underwent routine and delayed-phase 18F-FDG PET after surgery.Results Thirteen of the 55 patients presented gastric absorption of 18F-FDG,with 10 showing absorption of grade Ⅰ and 6 showing increased absorption on delayed-phase imaging.Difference of SUV was statistically significant between them,△SUV=(37.3±24.6)%.Six patients with local recurrent gastric cancers were newly diagnosed with dual-phase PET,not with routine PET,and 1 was false positive in diagnosis.Fifteen patients with local recurrent and metastatic gastric cancers showed grade Ⅱ,Ⅲ absorption of 18F-FDG,there was no obvious change in absorption nor in SUV on delayed-phase tomography.Meanwhile,17 patients had metastatic cancers.Only 22 patients with recurrent or metastatic gastric cancers were diagnosed with CT.Conclusion Compared with routine PET and CT,dual-phase PET is more powerful in differentiating benign gastric absorption,local recurrence and metastasis of gastric cancer,and is able to improve the diagnosis of recurrence and metastasis of gastric cancer.
【CateGory Index】: R735.2
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