~(18)F-FDGPET/CT Features of Patients with Organizing Pneumonia

Purpose To analyze the 18F-FDGPET/CT image features of organizing pneumonia.Materials and Methods The PET/CT performance of 11 patients with pathologically confirmed organizing pneumonia was evaluated retrospectively.Referenced with the relevant domestic and international literatures,the reasons for increased glucose metabolism in lesions and the CT performance of the same machine were analyzed. Results In all eleven lesions 18F-FDG uptake was increased with different degree, with the maximum standardized uptake value(SUVmax)ranged from 1.9 to 13.7,and a median SUVmax of 5.8.The SUVmax in bronchogram lesions was higher than those in non-bronchogram lesions(P0.05).The CT signs of the same machine showed a shape of pellet with flake opacities in three cases,and a shape of either nodule or mass-like in other eight cases.There were nine lesions with wide base close to the pleura,seven cases with edge showing concentric bow depression,nine cases with visible oozing lesions in the periphery.Conclusion In organizing pneumonia,the elevated level of 18F-FDGPET/CT glucose metabolism reflects the activity and severity of lesions,which however has a limited role in the diagnosis.The same machine CT images can be used to show details of lesions,which may be helpful to differentiate organizing pneumonia from other diseases.