Conclusions
We found that, through 18F-FDG PET/CT, (SDL/LDL)*(SUVmaxBio/SUVmaxTon) can be used as a good quantitative index to distinguish PTLD-negative and non-destructive PTLD cases. The sensitivity, specificity, PPV, NPV, and accuracy were 93.6%, 94.7%, 97.8%, 85.7%, and 93.9%, respectively. (SDL/LDL)*(SUVmaxBio/SUVmaxTon) can improve the diagnosis of non-destructive PTLD after pLT in the future.