ABSTRACT
Objective: To explore the relationship of 18F-FDG PET/CT imaging and pulmonary function and laboratory inflammatory biomarkers in patients with idiopathic interstitial pneumonia (IIP). Methods PET/CT imaging of 20 patients with IIP (IIP group) and 20 patients without pulmonary lesions (control group) were retrospectively analyzed. The maximum standard uptake value (SUVmax) and mean SUV (SUVmean) of the whole lung were measured, and the maximum target-to-back ratio (TBRmax) and mean TBR (TBRmean) were calculated. SUV and TBR were compared between IIP group and control group, and the correlation of TBR and pulmonary function indexes and inflammatory biomarkers in IIP group were evaluated. Results SUVmax, SUVmean, TBRmax and TBRmean in IIP group were significantly higher than those in control group (all P0.05), nor between TBR and erythrocyte sedimentation rate and C-reaction protein (both P>0.05). Conclusion: The radioactive uptake increases in IIP patients, which has certain correlation with pulmonary function.